""I don't judge people by what they do but I do feel genuinely sad if someone bright works as a cleaner or waitress""
Unless you know that, that person is unhappy, then that's very patronising.
I live in Liverpool, were its cheap to have a nice way of life (depending on what you want of course) and unemployment is high, so I and most people from "Up North" generally are less judgemental and make less assumptions than people from further South, I find.
I joke that we have the best educated unemployed in the world and also some of the most talented.
I've done every type of job, I had a great time Chalet cleaning for Pontins/Butlins, had fun working in many evening roles, having large amounts of time with my children was important to me. Then I became a SW, I told everyone I worked for the Council.
I've recently gone back to a Support role, my life is my own once again, I finish work and leave it there. I never envied the SWs I knew who barely saw their own young children or wider families. Earning more money isn't always worth it.
I very much work to live and not live to work. As do many people who chose not to do Further education and are having to earn a living as Waitresses, in Retail or as Cleaners.
Getting a BA doesn't mean that your any cleverer or know more than someone who doesn't have any qualifications. Some Degrees only teach you about your Subject matter and then you work long hours surrounded by people who have gone down the same route.
I've met some horrible people working in Social Care and some lovely Bankers, a job role won't tell you what sort of person someone is.
I go to a gym in a upper middle class professional area. Some of the women, Solicitors/Teachers don't bother speaking to me. Every now and again, when they are having conversation with the nicer women, I have cause to join in and it confuses them, because they know me as a Support Worker, yet I can lose them on some subjects.
I keeping my qualifications/experience to myself, it wheedles out the arseholes.
The most interesting women in there is one who worked in hospitality for Cunard and the Woman who ran rough pubs, they also seem the happiest.
I wouldn't say people Judge, but most people do make incorrect assumptions, about others, unless they've been taught or worked on not doing that.