Sometimes people make fun of those seemingly obvious studies, like "Study finds women are attracted to men with bigger penises," but that's mocking a specific study that's being used as clickbait by a news site, not mocking the profession as a whole.
It's entirely possible that the bad rap for Sociology comes from the fact that virtually the only evidence of their work outside of pure academia is this sort of study though. But then, if one measures the value of something based on utility, isn't that still a relevant critique? Isn't how a field affects us kinda important? So when we compare fields that produce cell phones, computers, space stations, and suspension bridges to one which produces reports on how women are attracted to wealthy men with large penises, I think it's fair to judge sociology on that basis.
I'm sure they do lots of important things that no one ever knows about, but that's kinda the point, isn't it?
My best guess is that Rush Limbaugh mocks it regularly and that's where his notion comes from?
If that's your best bet, you should try again.