It depends on the school. For Harvard, my understanding is, that it’s required to stay in a dorm and there are limited spaces.
There are awesome resources like Khan Academy that have unlimited spots. But with top schools there are limitations to size based on teachers, city spaces, etc.
it's like gold. the more people have gold, the less valuable the gold is, because it's no longer scarce.
i don't agree that more university students devalue universities however. on the contrary, more university level education is in my opinion the best response to less jobs and automation.
we need ever greater and greater parts of our society in higher education to study, research and teach, because all the low level jobs will eventually be automated away.
but imagine what our society can do if we are all educated to the level of a college professor. with more educated people we can address issues such as pollution and climate-change much more easily, and this can only speed up the advancement of our society.
There are awesome resources like Khan Academy that have unlimited spots. But with top schools there are limitations to size based on teachers, city spaces, etc.
University is a finite resource.