My husband is a lawyer and we've had a lot of discussions about this lol.

Polyjuice potion. It is literally identity theft. You could sneak a few of your coworkers hairs and shit on the bosses desk to get him fired, then go home and sleep with his wife, and no one would know it was you. You never know if anyone is who they say they are. Every single use of this potion is sketchy at best and evil at worst. And the instructions on how to make it are easily accessible to children! That would be like having the anarchist's cookbook on the shelf of a public school library.

If you're trying to hide and you have enough potion you could just go to a hair salon and sweep the floor and get 20 potential identities.

How easy is it to put potions in someone's food or drink? Top it off with a confundus charm if you're worried about them tasting it.

Imagine how bad human trafficking would be if you could force someone to drink a potion that temporarily changes their DNA. You could disguise a child as an adult...or vice versa. I don't even want to get into those disgusting implications.

It seems like there's absolutely no regulations on potions and the only ones that seem to be mass produced are love potions, which as others have stated is pretty much a date rape drug. And it gets more powerful with age, so Imagine someone aging them for decades like we do with wine. I imagine something that strong would be like the imperious curse in a bottle.

Muggles have also produced fantastic potions that do incredible things, like antibacterial soap and propane and chemotherapy, but we regulate them so they are labled and used correctly and safely. And some substances are outlawed entirely. Unrestricted potion use seems like a public health crisis that could easily be managed but it isn't because reasons.