“Presentable” and “attractive” are often different things. Most engineers I know put in enough effort to be presentable, but not attractive.

The traits associated with technical skills definitely bump the distribution more to the side of 'neckbeard'. So, yes, most programmers are normal (well groomed, exercise, developed social skills) but the number people who show no compelling evidence they possess a theory of mind is noticably higher and account for the tropes.

I like that "no compelling evidence they possess a theory of mind". I spent some time worrying about what "people" would think when I was young, but never "what does that individual person think?" And I never spent any time trying to be attractive because I didn't find men attractive. Reddit helped me read everyone else's minds and made me more normal, but I still don't have conversations where I'm thinking "How are they reacting to what I said?" or "What will they do if I act like this?"

I always assumed the unpresentable ones never showed up in person to things and therefore didn't present themselves to me