I don’t agree that they are real any more than other stereotypes are (there are women who gold dig, after all) like yes there are blue collar people like that but there are also plenty of empty headed people with lots of degrees and no common sense or interesting hobbies, etc.
But I think you’re right that that is the perception among some highly educated and/or high earners. My parents were extremely worried about my choice of partner when he was working service/construction type jobs and asked many questions that implied those types of stereotypes. Like they asked me if he’d been to prison, lol, if he used hard drugs, and wondered what we could possibly have in common, etc. My mom even said something about how I wouldn’t want to spend my life watching sports, drinking beer, and never discussing books or going to museums. But even when he was a low earner in a certain type of field he was super intelligent, individualistic, wrote poetry, hated sports, taught me a lot about lots of things, and had a really diverse social group (which I definitely noticed).
It took years for my parents and my extended family to accept him, though. It really wasn’t until he went to school for a STEM degree that things changed a lot. Once they saw he had that type of ability everything changed completely, even though he still had tattoos and was a little rough around the edges for their tastes. Once he started making a lot of money it shifted further, but even when he first started going back to school I got some comments like, “don’t be too surprised if he drops out,” and similar things.
It’s funny too because my family was a real american dream story, like my grandparents came here with nothing, had very little education, etc. But then within one generation there was lots of wealth and there was always a huge focus on reading and education. So I don’t think it was just about not having money, it was about the perception of US vs. THEM in terms of types of people without money and their perception was that he was the wrong not-classy or upwardly mobile/educated type. Wild.
ETA: But like I said, I firmly believe people can have any standards they like! And if someone only wants to date someone who went to an Ivy, or who has a certain earning power, or a specific niche hobby, or can build stuff with their hands, or whatever, that’s cool with me! I just think people are missing out on true love sometimes because they are too narrow minded and focused on superficial things (hobbies, outward things) <3 and I love love!