I think nepotism is less bad than slavery. I had debt with no degree, nothing to show for it. I had to work and not get to keep the money. I felt like a slave. I don't want other people to be in debt slavery.
Nepotism only would affect me via envy. Debt affected me daily, mentally, harshly. There were days when I could think of nothing else, miserable at my situation. Nepotism is nothing compared to being in debt slavery. Who cares what other people are doing. Am I free?
Nepotism is a step backwards from this goal. It is only a solution to a symptom of the current means, without achieving the same ends.
The unlimited student loan situation has directly caused the bloat of university administration, salaries, and spending. It doesn't cost $40,000 a year to educate someone.
Then indeed expensive useless degrees will (like a gap-year in first-class hotels) be available only to the rich. But useful job training will not be.