Shotacons in BL

Why do so many people in BLs look so dangerously young? Like- does anyone else see that one popular “reincarnated into blahablh” manwha and the cover has a GROWN ASS MAN AND ANOTHER GUY THAT LOOKS LIKE A LITERAL BOY?? And don’t you start talking about some “Oh no, he’s actually the top and 18202829 centuries years old!” Um— I’m sorry but you literally sound like those lolicons