I went to college (University of Georgia) with Pell Grants for free. 100% free including lodging and dining, both Bachelors + Masters in Physics. My parents were unemployed at the time and we interviewed at the deans office for the grant, I clearly remember when my father broke down in tears. I had to borrow friend's books, use the library scanner to create PDFs of the pages that were important - couldn't afford textbooks.
I am eternally grateful for the FAFSA/Pell Grant program. Without it, I wouldn't be conducting fundamental science and getting paid 6 figures.
I know this is N=1 sample size, just wanted to put it out there.
I think college should be free only for people that cannot afford it. Rich kids should pay.