If the topics are genuinely difficult, I don't think it's likely that many people who understand them would argue that Eliezer's points are plainly false. Occasionally people drop in to argue such who clearly don't have a very good understanding of rationality or the subject material. People do disagree with Eliezer for more substantive reasons with some frequency, but I don't find the fact that they rarely pronounce him to be obviously wrong particularly worrying.