I am also not much for fighting but a lot of the shit like Muay Thai or especially Krav Maga (say what you will about the Israeli state but they know how to do the violence) is practical and used in combat.

The more you do something the more instinctual it becomes whether it's a round of pool or shooting at a range or fighting so when your teeth are about to be knocked in the response takes over (and a lot of martial arts involve sparring specifically for real teeth knocking simulation)