Why is it necessarily more rational to disregard “social consequences”?
I think it’s not irrational per se, just that it probably wouldn’t fly in this community as a substantive consideration in whether an argument should or should be presented here. Usually it’s considered eminently rude (but not strictly false) to say that the members of your own ingroup are too dumb/biased to discuss a given topic fairly.
I suppose I could also try to bootstrap this into an argument for a strong presumption against restricting speech due to its expected “social consequences” in general, but I think my original points suffice.
I don’t think so, unless you’re implying that the armchair theorizing in this community is always rude. I’d prefer to presume that not to be the case unless there’s evidence otherwise… and I conceded in my top-level reply to this thread that there sometimes is (in my view.)