Maybe you are pursuing a different point than mine, but my own point was about alienation, not supererogation. I don’t put EA proponents on such a lofty pedestal.
I do think that the implied burden is still alienating in a sense and that's what motivated my post (the philosophy can just feel really bad in some ways when you get into the nitty gritty, and many people don't respond well to that), but you were clearly talking about a different kind of alienation.
(Edit: reading my first post, it's definitely the case that I did not make the connection here explicit- the rejection isn't merely 'oh no I can't handle the TRUTH', but more like, 'ugh, these guys'. A big part of it is social in nature, stacked on top of the underlying problem of asking too much.)
A huge part of EA is driven by analysis of effectiveness. If I want to be effective, I have to figure out how to be effective. If someone provides a valuable insight on how to be more effective, it's not a rejection of my ethical outlook, but rather useful information.