I think that post is wrong as a description of the LW crowd's goals. That post talks as if one's akrasia were a fixed fact that had nothing to do with rationality, but in fact a lot of the site is about reducing or avoiding it. Likewise intelligence; that post seems to assume that your intelligence is fixed and independent of your rationality, but in reality this site is very interested in methods of increasing intelligence. I don't think anyone on this site is just interested in making consistent choices.