If the strategy is vibes-invariant, it's also ignoring useful information. It's not sensible to use an X-invariant strategy unless you believe X carries no information whatsoever. And that's kind of what the OP is arguing, that vibes do carry information. If you disagree with that, argue that directly! Arguing that you can adopt an invariant strategy without tossing away information is not correct or useful.
I am not one to suggest ignoring useful information if you're able to process it in order to get a better answer. However, I think all the examples above were examples where people do not expect to be acting more effectively after processing the information.
That is, I agree with you for a perfect Bayesian that you shouldn't ignore anything ever, but I read Said Achmiz as saying "If you get bad vibes from someone, be safer around them through planning", which is not actually a qualitative difference from what Kaj Sotala suggested.
3Said Achmiz
This is not the case. It is sufficient for the X input channel to be very noisy, biased, or both, or for mistakes in measurement of X to be asymmetrically costly.
Separately, you may note that I did not, in fact, argue for a “vibes-invariant strategy”; that was @Mo Putera’s gloss, which I do not endorse. What I wrote was:
and:
This is explicitly not an argument that you should “toss away information”.
If the strategy is vibes-invariant, it's also ignoring useful information. It's not sensible to use an X-invariant strategy unless you believe X carries no information whatsoever. And that's kind of what the OP is arguing, that vibes do carry information. If you disagree with that, argue that directly! Arguing that you can adopt an invariant strategy without tossing away information is not correct or useful.