Part of it appears to be Komponisto's style: the post is peppered with things like "completely", "utterly" "nothing", "ruthlessly", "gigantic".

However, I think "shut that voice out, ruthlessly" may be pretty good advice at least at some point in the thinking/decision process. Because even after you've taken everything (including that voice) into account, and concluded that the true answer is different than it "feels", and the intuition you feel is the result of an identified bias, your right answer might still "feel" wrong. The bias will keep injecting doubt, and it takes effort to shake it off. It's hard to get a heuristic to admit it when it's leading you astray. ;)