Those exist, but in my experience imbecility is well distributed in the population, irregardless from the education level. This is also strongly supported by electoral polls that group their results by this datum.
People who have a degree of course won't tell you that a degree is useless, but that's only because if they did you'd (reasonably) ask "then why the heck did you pursue one?". However, they'll make similar statements about degrees in other fields, because essentially they're no different than the random boomer with elementary school level that get systematically indoctrinated by religious/political cults.
