The problem with cosmetic microtransactions is that it gives the creators a monetary incentive to make sure nothing you can earn in the game is as appealing as the microtransaction items, or that their availability (in cases where you can earn the same items in-game) are low enough that you’ll never reasonably earn what you want.
You can say ‘Cosmetics don’t matter!’ but the astronomical sales of cosmetic items pretty much proves that to the majority of players, that is not the case.
They also often intentionally create game mechanics specifically to ensure that players who aren’t paying see the better-looking players who did pay.
I had no idea what ‘OPP’ stood for as a kid, which is funny, because it’s right in the lyrics, but I was too young to understand what that meant. So I, too, would just belt that song out whenever it came on. Nobody stopped me, either.