Because it is still credible that the not-superficially-nice parts just haven't been covered yet - rather than being outright lied about.

Isn't exploring the consequences of something like CEV pretty boring? Naively, the default scenario conditional on a large amount of background assumptions about relative optimization possible from various simulation scenarios et cetera is that the FAI fooms along possibly metaphysical spatiotemporal dimensions turning everything into acausal economic goodness. Once you get past the 'oh no that means it kills everything I love' part it's basically a dead end. No? Note: the publicly acknowledged default scenario for a lot of smart people is a lot more PC than this. It's probably not default for many people at all. I'm not confident in it.