Katy Perry isn't a teenager . So yes she is trying to be something she isn't
It's thematic! Between her teeny bopper songs, she has adult songs like Uncle and By The Grace of Bey. She knows how to stay profitable, sure. But she's not pretending to be a pseudo-intellectual "artist".
I love you but why do you think there's only ONE fanbase that intensely hates her?
Jealousy, obviously. It doesn't help that another stan group obnoxiously pretends to love her just to rile up the others (which makes them 2x more bitter).
like they cried every time Katy stomped on Gagz 
