When u smooth animations it means that it's been tampered with. Smoothing it changes the way you set it up, so it might be best to learn some animation without the smooth procedural. But in my experience it works fine for me and benefits the animation quite well. Cgi Joe uses it.

Smooth procedural slider helped me alot tbh and it makes it look more appealing but DON'T be reliant on it and i mean it to the absolute minimum. ANIMATE as much rigs as possible if needed to (ofc don't do ones you don't need to) BUT to create realistic movement u must animate nearly all of the bones needed to be animated, then u can use the smooth procedural.

Ya wanna go for popularity tf2. Ya wanna go for creativity L4D2. ya wanna go for unique stuff fnaf.