"This post seems rather long. Here's what I'm hearing here:

Some people's beliefs or assertions (at least, on topics outside the commonplace) do not constitute very good evidence."

Yes...but my point is also that we underrate the difference between people. Some people's assertions constitute very much stronger evidence than others.

Some people are more well-calibrated than others. But it's not instrumentally effective social behavior to go around putting calibration stickers on everyone's forehead."

We do of course do that to a certain degree - give some people titles and such intended to show that they are well-calibrated. But yes, in many situations genetic argument have negative side-effects. But there are also many where they don't, as I point out.