Not allowed to yawn

Not a big deal because I'll do it anyway but why does islam have SO many rules. Like my mum has a go at me every time I yawn. Like freaking yawn. Talks about how I'm just disobedient and a bad Muslim because I don't listen to the prophet who said yawning is bad or wtvr but like what's with all the dumb cult rules. Muslims always argue that there's 'wisdom in everything, like okay gambling and drinking makes sense but pedophilia sex slavery(rape), killing apostates and gays is allowed but I can't yawn? And this stupid religion makes people so indoctrinated that they actually believe this bs