That's not right either.
MTXs are just tools. Tools are not good or bad by themselves. One again, I will refer you to Path of Exile: free to play, full of MTXs, yet none of them gives you a gameplay advantage whatsoever. It can be argued that a bigger stash does, but for the purpose of our discussion here, when you buy stash space in PoE, you buy stash space; there's no chance/luck involved.
I would be content if p2w titles were labeled as such. I would be ecstatic if, once labeled, they're also marked as 18+ because, you know, that's when you're legally allowed to own a CC to pay for all the crap.