What is the practical significance of "smashing boxing" in traditional Wushu routines?

Punching is powerful and aggressive, which can make the opponent's attack ability lose in a relatively short time: if you switch to punching with a fist eye as you said, the strength will be smoother, but the flesh of the fist eye is thicker and the attack on the opponent is not aggressive enough. As for what you said, it will be painful to attack with your fist, because your martial arts foundation is not enough and your fist is not hard enough.