The only way I can psychoanalyze this is that Pippa fundamentally believes that all famous people are evil and actively engage in unethical practices to get ahead, which is probably true (and they also rape children but that's not focus here).
Pippa's only goal in life, seemingly, is watching number go up on social media. Therefore, Pippa believes she must be evil and a bad person in order to get ahead. There's a kind of cognitive dissonance because Pippa is a good person, but she's only ever cared about getting big and that requires being evil (in her mind). I think Pippa knows she couldn't actually do anything that would enrich herself if it meant hurting someone else, so maybe she's worried that she'll never get super big.