It is what she is being taught....probably the school and her parents
90% of adults are too stupid to raise pets, much less, children. Mostly, they don't want to be bothered actually "raising" their kids.
Kids today are mostly motivated by peer influences. It's what those idiots are disseminating on twitter as the absurdity du jour is what they believe.
Kool Karen gets a tattoo? Everybody wants one. Etc.