The amount of times I’ve had to use a trainer to make gameplay possible when my hand is acting up (and one time when I was cat sitting, and the goblin demanded a hand just for him) is enormous.
It is literally the difference between being able to play a game or not. I really appreciate the options being under accessibility in newer games!
This goes for single player though. Multiplayer is reserved for days when my hand is functioning enough to allow it without trainer assistance.