look at how gsp changed the game with a simple jab
The threat of the TD against GSP made him more effective on the feet.
Watch in the Hendricks fight how GSP's jab was almost completely neutralized. It's because Hendricks didn't fear the TD, he was confident in his ability to stop GSP's TD's and also the fact he is a southpaw making it a little easier to block GSP's lead hand and parry, slip his jab and counter. If Hendricks was orthodox, I bet the fight would've played out a lot differently. The fact he is southpaw was a huge deal, believe it or not. Also, the fact he is a hell of a wrestler and was confident in his ability to stop GSP's TD's, which helped Hendricks open up more on the feet than almost everybody GSP had fought because they feared the TD, Hendricks didn't.
Pro boxing and boxing in MMA are very different. Like someone else said, kicks & knees are a huge thing. You can't come in and stand like a normal pro boxer would because you would be eaten up with leg kicks and if you move your head around like a pro boxer, it just doesn't work as well.
Standing like a pro boxing makes you susceptible to leg kicks, and moving your head around like a pro boxer can make you susceptible to, again, leg kicks, but also head kicks and knees. Pat Curran's head kick KO over Marlon Sandro is a good example of trying to move your head like a boxer in MMA doesn't work as well.
Here it is:
That's why moving your head like a pro boxer doesn't work as well in MMA because this can happen to you. Sandro should've kept his hands up, but my point still stands. Pro boxing defense simply doesn't work as well in MMA. Very few guys have been able to come in and move their head like a pro boxer and have real success. That's because they know how to also defend against kicks. They know how to adapt that style to MMA and make it effective and that shit isn't easy because MMA is just a whole different world. The stance has to be very different and the TD threat is there. It's a different world.
The threat of the TD is a huge thing, too. Like I said, the threat of GSP's TD made him more effective on the feet.
Khabib Nurmagomedov's striking is horrendous. But, he is very effective on the feet against guys who are far better than him in the stand-up, and it's because of the threat of the TD. It changes everything.
You need to learn the differences between the two. Talking about Marciano's movement and comparing it to poor boxing defense in MMA is complete nonsense. MMA is a whole different world. The boxing aspect of MMA is very different than professional boxing.
If GSP never went for TD's and only looked to strike, he wouldn't have been nearly as effective. His opponent's would've known he isn't going for the TD and they would've opened up more against him. The fact GSP will take his opponent whenever he gets the chance really changes everything. GSP outstruck better strikers on the feet because of it. In pure striking, they would whup his ass. In MMA, GSP dominates them even at their own strength.
There is no comparison between the two. Go do some research about the differences of boxing in MMA and pro boxing. It's a whole different game and you need to understand that.
We've seen better strikers get handled by lesser strikers on the feet many times in MMA. The threat of the TD is a huge factor. How you didn't understand this is amazing to me. Comparing MMA boxing and pro boxing is ridiculous.
Go watch the fights and do some research. Until then, you shouldn't even post in your own thread because you're only going to embarrass yourself due to your lack of knowledge on the sport of MMA.