I never really watched much of it, but this PA comic[1] from a few years back clued me into this. I can't say I disagree (even if I've known plenty of nerds that like Big Bang Theory). Sterotypes often have some truth to them, to lesser and greater degrees, but that doesn't mean playing them up to an extreme degree for laughs is something we should necessarily encourage.

1: https://www.penny-arcade.com/comic/2013/01/21/royalty