Raising you well has nothing to do with it, and your parents are under no obligation whatsoever to trust you. It's their money. Their money from their job or inheritance = they decide what to do with it. Your money from your job or trust fund = you decide what to do with it. If you can not otherwise afford to pay and your parents are willing to step up and help you, then quite frankly you should be grateful. Making petty demands of someone financially supporting you sounds like a pretty good way to get cut off.
Petty demands like "Please help me pay to make something of myself in a profession where the tuition has risen approximately 1000% since you had this option, mostly as part of a ploy to ensure your generation has a shitload of tenure track spots, and to keep paying into social security for your parents who will continue to vote against me getting grants or other education while continuing to vote to maintain their social security and other entitlements that benefit them and their poor choices regarding retirement savings?" or "If you don't help me I'll have to take ruinous loans, loans that your generation didn't really have to deal with, and that will likely be held against me on the C&F portion of the bar, the committee being run by a-holes of your generation that are totally out of touch with the reality on the ground?"
No wait... those aren't the petty demands we are talking about. We are talking about saying to your parents: "Hey, I am going to my ASD. I'll bring you back some literature. When I am done, I'd love to give you a tour if I attend."
Also, how many parents are knowledgable enough about the profession or legal education to even be able to see past the BS of ASD to actually know what is or isn't important? The most likely ones who can (lawyers) already know, and don't need to go. The rest just get in the way and make decisions about where they want to spend their money based on things like "OMG honey, did you see that your school is ranked #1 in INTERNATIONAL LAW??!?!?!!! Isn't that amazing! You so need to go to Cooley honey! #1 in International Bird Law!!! And their facilities are so nice! Where do they get that money, do you think?"