We need to be wary of falling into a 'growth is good' mentality, which can ossify into a 'growth by any means necessary' approach. To me this is the fundamental ideological driver, lurking beneath the various political-economic factors @pluralistic identifies as the causes of enshittification on the platforms.
That said, I do agree with @deadsuperhero on the larger point he's making here. #Onboarding and #UX do need a dedicated pan-fediverse focus, like we have with IFTAS on Trust & Safety.