FAFSA helps colleges determine if your family has financial “need”, as determined by their formula.
The UC’s are public schools, supported in part by Calif taxpayers. They do not have multi billion$ endowments that can spay for generous FA programs for upper middle income families.
Anyone making $200K and apples to a UC, is going to have to show a tremendous number of unexpected and unavoidable expenses, such as catastrophic medical bills, or having many kids in college at the same time, in order to qualify for any additional financial aid to go to a UC, beyond the $7500 in federal loans.