Yeah. It's an instinctive defensive cover. Presumably, someone who hits you in a way that would force that response from you, is close enough that you can strike the elbow or your cranium to a soft part, like mouth or eyes or throat.
Theyre also in the process of hitting you. If youre able to cover your head and swing wide elbows at them, theyve stopped doing what theyre doing.
Move your hands backwards and it will. It's not as if other martial arts don't involve defensive movements.
Whilst swinging your elbows? So, you cover your head. You then try to swing your head with your elbows, but in the process you idenitfy the angle of their strikes, assess the range, and cover your head accordingly? It isnt defense i take issue to.
Expected by whom? People who bully or harass people who they perceive to be weaker, don't expect a forceful response, and they sure as hell don't expect a headbutt.
Those arent the people you need to worry about. But even in mundane fights, headbutting is quite common, in this country at least. I cant speak for others.
Also, even bullies arent stupid. Unfortunately, unlike what some school teachers might say, bullies usually arent just losers who pick on people to make themselves feel good when really theyre compensating for something, or various other tales.
For less than a second, and that's all you need for you head to make contact, which would, presumably, compromise your opponent's balance.
The average untrained person can throw about five punches per second. They dont care what youre doing.
Get someone to punch you bare knuckle in the back of your open hand, five times with good follow through in rapid succession.
The difference is miniscule in the context of a rapid fight. I don't know everything about KFM. My assumption is it deals with that. I doubt that if you ask the founders of KFM that question, they'll say: "****! We never thought of that!"
In a rapid fight, you probably wont have time to cover your head with both hands, assess what kind of strike is coming at you, cover your head accordingly, then swing your body at them from the correct range. I dont know everything about KFM either, but for what its worth, what they HAVE thought of is that their style is instinctive, and in you already. I mean, you see the stuff in that video happen all the time, surely.
What do you consider to be the good things in the system? Headbutting isnt new, but throwing it low to the body will strain your neck with contact (And youre welcome to try that at home, if you have something with a decent mass and some hard bones in it to ram your head into at collarbone height). Elbowing isnt new either.
Have you tried even just mimicking the movements yourself at high speed to see how instinctive and 'in your blood' they are? Maybe they are in
your blood, and youve struck your own personal gold.