I suppose some of it is attributable to Asperger's -- some of it. In many cases, though, I can't help but suspect laziness and a holier-than-thou attitude.
A short explanation might be, socially skilled people are slow (lazy) to understand anything technical and are impatient (holier-than-thou) with unskilled people. Technically skilled people are slow (lazy) to understand anything social/political and are impatient (holier-than-thou) with unskilled people. I think it's possible, though slow, to teach any skill to anyone. To really fix the problem, maybe start by convincing companies that teaching skills outside your area of expertise is worthwhile. I can get technical training paid for by my company. Social/managerial training, not so much. Likewise project managers can't get reimbursed for technical training. The assumption seems to be "Oh well they don't really need it and what they do need they'll pick up on the job or on their own time."