This is all bro science at best. You're using terrible examples to illustrate your points. Of course new people lose to trained people, but the stronger ones do better than the weaker ones. Their limbs will be no weaker or more stiff in unusual ranges of motion than someone who never lifted, in fact they'll be stronger.
They will be fast because lifting heavy weights increases rate of force development. Slow compared to trained fighters, but faster than weak beginners.
S&C does have a significant impact on fighting ability, and athletic ability in general, which is why every single combat sport in the world hires S&C coaches.
Two people with the same technique will absolutely not punch with the same speed and power if one is stronger. The stronger fighter will hit harder and faster because their muscles can produce more force, and produce that force faster. This is a basic fact. You're literally arguing against science and against reality.
Lifting trains strength. Strength is the ability to generate maximum force, and is related to the rate at which force is produced. Technique is taking that force and applying it. The ability to produce more force, and to produce it faster, translates to technique being performed with more power.
You're the one spouting bro science. Strength equals the rate of force x applying that to technique blah blah.
If you had any significant martial arts training, particularly striking training, you would know that muscle mass isn't what generates the force to knock someone out. It's weight transfer from foot to hips, turned over to fist or foot to hips, turned over to foot. In order to generate force in this manner your body has to be loose and it has to be conditioned to move your body weight through that sequence as quickly as possible to generate maximum force.
How in christs name, is standing, sitting or lying stationary, tensing every muscle in your body stiff in order to slowly press hundreds of pounds of weight away from your body with just your arms, or just your legs helping you to condition your body to fluidly move your body weight up from ball of your foot all the way up through your hips and out of your fist? Please explain that to me.
There are techniques for developing this weight transfer and staying static in playing and slowing pressing pounds off your body in various places is not it. Hell slamming a hammer into a tire mimics this better than what you're talking about.
There's a reason that every ufc embedded episode when they show the fighters new s&c routine its different than the last fighters. Thats because these s&c gurus, like you, have no martial arts experience and so they just have these fighters doing random shit that they think memics what happens in a fight. And as you said, because these s&c gurus have fancy degrees, facilities and because they showed some running back how to do sprints with a parachute on, these fighters believe they can show them how to get an edge on the competition, when the tools to win reside in the tried and true techiques and conditoning practices of the various martial arts that have been being developed for the last... idk 1000 years.
I guess you missed the part where i said EVERYONE gets destroyed when the first enter a legit gym, theres no such thing as, well this guy lifted weights for 10 years so he came in and managed to survive without getting taped by the purples, browns, and blacks. No, when you come in and you have no experience, you get worked, end of story.
You do insane cross fix cardio routines? Congrats, you're going to be just as winded as the couch potato, its not the same cardio. It's not the same, its not the same, its not the same.