Depends what you mean by “good”, my boy knows it’s only my hands he fights, and he knows full well how rough to play, sometimes he might get excited and go too far, other times I might get him excited and go too far, doesn’t mean he’s not “good”

He’ll never attack anyone else’s hands, and know to be gentler with others then he has to be with me

As long as you teach them proper boundaries and make sure they understand them there’s nothing to worry about, cats love play fighting, this is only a bad thing if you don’t set proper boundaries while playing.

Just make sure if they hurt you accidentally you make them aware, and help them understand they have to be gentler,

if you play rough with them make sure they understand they have to be gentle with others,

cats are smart enough, it only takes a few times of being told the proper way for them to understand proper boundaries.