>>214385866
I think it's more that Ip Man challenge are actually much bigger than what he can do physically by punching someone.
Ip Man could be the greatest martial artist in the world but he can't punch the entire japanese army by himself. He starts as a rich lord hermit who lives in his ivory tower above everyone, respected by the entire community and is reduced to someone who has to have his means taken care of him because he has no idea how to do menial work. When he snaps and brutally beats the 10 karate men he feels powerless because that's nothing and his friend still is dead thanks to the japanese. He wonders what he can actually do and finally starts teaching kung fu to people so they rise their morale and whatnot
He could punch faster than everyone but when his wife gets cancer there's no Wing Chun that can save his wife.