A lot of the "normal" opportunities for socialization have evaporated, though, leaving only the lunacy and strange ones behind for many people.
In my country there is no clear distinction of what type of people make up the crowd which is "still" socializing. While you get some pockets of conspiracy theorists, covid-deniers, mixed with conservative or right-wing elements, the left, or even politically abstinent are also there. It doesn't make them all abnormal people. There are some who I have perfectly communicated before the pandemic. But the pandemic has made many people mentally struggle (without a need to lump them all together into "abnormal").
My guess is those who have already been (mentally) vulnerable are now even more so because the world around them is becoming even more depressive/depressed. It's not that there are only abnormal people left who to socialize with. It's because many just die because they were anyway hanging on to a bare minimum before. It doesn't require the presence of "abnormal" people to kill them. It's enough when a support structure that they previously had (a friend, a source of fund/support, etc) simply breaks away. it's not an addition that hurts them but something that is taken away. (so it's actually less complicated/complex/conspirational and more ugly/sad as to why this happens)
The point I'd meant to make is that some people have 60-70% of their connection to eccentrics, online communities, etc. But they typically also have some contacts with work, from seeing family, when traveling, or chit-chatting with people at the store. Suddenly all of these other contacts are gone or much less frequent.
And the "normal" people you talk to are, as you say, depressed and much less normal.
I'm certainly in this boat to some extent.
I think it would be arguably reasonable for someone like this to socialise right now. The risk is lower than the flu of any complications. The only reason you are being locked down right now is because we have decided governments need to enforce lockdowns on everyone, rather than individuals deciding what's responsible.
I don't think you need to be super crazy, or a covid denier, in the case above, to carry on living your normal life.
The other element of this that's highly questionable is the claim that "the risk is lower than the flu of any complications". I'm really not sure this is actually true; a significant portion of people seem to be COVID "long-haulers". Even if you're not, maybe some of those other people you're socializing with might turn out to have those risk factors.