Fair question, and I will use a few analogies to articulate why I view this philosophy as dangerous.
I will avoid making obvious embellishments, such as comparing stuff to Nazis or other extreme shit like that because it's not fair to anyone.
Veganism actually works nicely, and I think it is a fair comparison. So we might agree that veganism is a mixed bag when it comes to health. It almost certainly leads to less calories (since you can't consume meat and dairy, you won't be eating McDonald's burgers or a pound of chocolate like so many people do), you won't eat too much red meat (which is definitely bad for you), and it might cause you to take a good look at other parts of your health. Similarly, MGTOW has some surface benefits: It is better to marry no woman than the wrong one (I would just say that marrying the right woman is better than marrying no woman, so by entering the dating pool, you assume some risk), and it does seem to encourage men to direct some energy towards their careers and hobbies (which is better than rotting away on the couch or implanting your entire identity into your partner, aka being dependent on others for identity). BUT there are some serious costs to veganism. After a while, your body loses the ability to even digest meat, so you've permanently boxed yourself into this way of life. It's also not the most efficient way to have the best health, as most of the science I've seen reaffirms the simple truth that a well-balanced diet consisting of fruits, vegetables, eggs, fish, poultry, complex carbohydrates, and a tiny amount of red meat is the best thing for you. It's about balance. Similarly, if you adopt this MGTOW until you're 50, you've effectively removed yourself from having the possibility of having a wife and kids (unless you marry a significantly younger woman, which is statistically dangerous because those tend to be gold-diggers), so you're really painting yourself into a corner. Had the same person just said, "Well, that didn't work out. Yeah, it might have been painful, but I'm not wasting another second of my life thinking about that cunt," then you'd have an opportunity to get over it, and live your life to the fullest on your own terms. That means a career, hobbies, women, etc. Quick aside: The problem with so many people today is that they lack good social skills. Most of us, when we are young, meet girls in bars, clubs, online, or at work. In those cases, particularly in the case of work, it almost certainly makes you decide things. She probably doesn't have all the same hobbies as you, so you're forced to choose between your hobbies and spending time with your girl. In the case of work, you might actually have to decide between your relationship and your career. That's not good! You should be highly discriminatory when selecting a mate, ensuring that she has similar interests (or is willing to entertain your interests while you entertain hers) so that you can both spend time together and be together. When you do that, you've literally got it all. That's what I feel like I have with my wife. In a few weeks, we are taking some time off work to go snowboarding together in Aspen for a week. That's pretty great! In the bad times, she was there when I broke my back in a skydiving accident, and I feel like she was instrumental in helping me get through that. Aside over.
I guess what I am talking about is balance. Being dependent, helpless, or so afraid to lose your girl that you are unwilling to set boundaries (like those dudes who let their girls walk all over them) is one extreme, and I don't recommend it. I find it to be extremely shitty behavior, and that kind of behavior should be shamed so that others see it for what it is. Sometimes, that's like kicking a wounded puppy, so you have to be careful. But MGTOW is just the other extreme, and my fundamental problem is with extremism in all its forms. It's shutting off all women because of perceptions on how things will inevitably go (somewhat ironically, many of the older members of the MGTOW group are just dudes who over-corrected when they stopped being part of the first group (lets girl walk all over them)). I would assert that the balance is the key, finding the middle. There are definitely high-caliber women who are right there in the middle as well. The great part is that we collectively select those woman, leaving the fringes out in the cold, then the fringes will actually start to disappear. That has to happen because they aren't breeding, and well-adjusted parents are more likely to raise well-adjusted kids. If MGTOW's message was, "Guys, the courts are shit and might shred you (they actually say this now, and this is true). Because of this, we proclaim that the right thing to do is make yourself the best version of yourself. Don't neglect your career. Seek to be great at it, both in terms of its profitability and in terms of being a true master of your craft. Focus on your hobbies, giving yourself the outlets that you need to feel personally fulfilled, whether that be creative output or physical accomplishments (I will say that they pretty much say this now, and this part is totally fine). Be incredibly discerning with women, only allowing yourself to accept a woman that is on your level. Don't just grab the random hot girl at the bar. Look deeper, making sure that she is driven and wants the same things that you do. Only accept women that are your equals in life, someone that you can build an equal partnership with so that both of your lives are enhanced by the other (this is the rub: MGTOW just says to avoid serious relationships with women, definitely avoiding cohabitation and, above all, marriage)," then I would be fully on board. It is that final tenet that is just a hard no from me. Again, be discerning, be picky as all hell, and hold yourself in high enough regard to demand the best for yourself. But don't just shut the door entirely because you had a bad go at it or are getting impatient that the right one hasn't come along, assuming she never will.