Play fighting is fine, they just need to learn claw control. Recoil and stop play when you get clawed. I’ve got three cats here I can wrestle with without getting a mark on my hands or arms. A long thick jumper they know is safe, but bare skin they know is not for claws. It’s so well learned that even when you need to do some maintenance or intervention they don’t like, they will not claw you. Like washing diarrhea out of their fur, or some emergency medical intervention.