I have a theory about autists like this on Tumblr and Wrong Planet. Many of these people were diagnosed as children and probably grew up hearing about how famous people like Einstein, Edison, etc. may have been on the spectrum. And if they also happened to show interest in something like STEM (or some similar high-paying field which isn't particularly social), their parents may have put all their eggs in one basket and basically let them hyperfocus on that at the expense of learning other skills, with the goal of this becoming a lucrative career for their child. By the time the child is of legal working age, all they're heard is how smart they are in their given field and how rich this career path is going to make them. They may begin to feel (and I'm not convinced in at least a few cases that the parents haven't actually told them to their face) that someone with their "intelligence" is simply too talented, sophisticated, and special snowflakey to work at McDonald's or Walmart for minimum wage at 16. They feel entitled to pull in six figures a year fresh out of high school.
Another part of me wonders if some of these parents hear that STEM is often a popular career among those on the spectrum and sort of pigeonhole their kids into it rather than looking at the child's actual talents and letting them try their hand at different things. Ironically, these are probably the same parents who whine about people stereotyping their children as technology-obsessed basement dwellers.