@Creekland - Interesting questions. Your points seem very valid.
Yes, the need to support a family would not be addressed through any financial aid package, so that would indeed be something that might affect someone’s choice whether to go away to college. There are always kids who will face tough choices when considering their families’ situations. I know someone who chose a commuter public above a tippy-top to stay at home with his mom who was having health problems, after his dad died just before he had to choose a college, and his mom would have been alone. It did not sound like the OP was in a special situation like that, or a financially aided student living in poverty, though— it sounded like a choice between going full pay public or full pay private (?).
The only easy answer to your (Creekland’s) questions is transportation. That is part of the aid package. For many aided students, the college pays the transportation costs twice a semester (start and end of the semester). A lot of the kids go home with friends who live nearby for Thanksgiving and other shorter breaks, although the dorms and dining halls remain open.
In my kid’s entry (dorm group) alone, there was a tremendous range of wealth from very poor to crazy rich, and lots in the middle (working class to professional class), and close friendships cut across all these levels, so the diversity was experienced in real life and not just on paper.
Regardless of income, the kids pretty much all wore t-shirts and sweatshirts and jeans, although there were occasional semi-formal parties. My kid wore the same outfit to each of those, but he’s a boy, so maybe wardrobe is less of a thing for boys. A published interview with a financial aid officer noted that the college will buy you one suit for interviews if you are on aid. Most events on campus were free, and the financial aid plan is pointedly designed with typical college kid spending needs in mind (as per the financial aid office). For S’s friends, the college has paid for opportunities like studying abroad, overnight trips to major cities to look at different types of careers, music lessons, and skiing and snowboarding lessons. Colleges are always trying to be increasingly sensitive to the needs of lower income students. For example, Princeton increases financial aid for juniors and seniors so that they can afford to join an eating club just like their wealthier peers. I do think that colleges still have work to do in this area, but listening to the efforts that colleges are making to recruit and support low income students, I think it is a major priority for top colleges now.
A top college’s diversity is part of the educational experience. It is pretty cool to be surrounded by people from all around the nation and world, from a wide variety of socioeconomic backgrounds, races, interests, etc.