Is an private undergrad degree worth paying more for vs a CSU or UC undergrad degree?

I trust that top 5%-10% of public and private schools are typically the most driven and remarkable people. We visited CSU Chico CS department last Oct. The top students and their senior projects were very impressive. They proudly told us that their friend was selected/hired over some Cal students in a job fair. The profs know all their top students. A class of 175 to begin with, only 28 graduate with a CS degree for various reasons in the end. Yes, this is not a selective school, but, we took away a few messages for our son’s decision making. The fit is important i.e. how will our son strive…