How to make a character bounce off a wall?

Maybe my answer is stupid or maybe I didn’t complete understand what you need, i’m not English native speaker sorry about that… but…

if you’re a professional animator, why you’re not creating some realistic reaction animation when the actor/character bounce on a wall instead of using physics?

i’m not an animator and i arrange with physics and other marketplace animation, but for you will be very easy to create some nice animation for simulate this specific condition, no?