I don't really understand what you're going on about. The parent was discussing about how most people in college are either living off loans or their family but when they graduate they have to get a job because no one else is paying the rent. I don't know, it's pretty simple, right?
You're talking about some kind of "workers of the world unite" type stuff, which is not where the parent had any intention of going.
The thing is, most college students these days don't actually have someone else paying the rent. They have their future selves paying the rent via student loans. There's a level of indirection, of insulation, yes, but ultimately they are not actually being supported off someone else's charity.
Actually, given the interest rates and contract conditions on student-loans these days, I'd argue students are blatantly exploited. But that's beside the point and even more political.
No that's actually the only point of #4. The whole context of this discussion is the difference between students and graduates. One thing that happens when you graduate is that it becomes a lot harder to recruit your "future self" to pay for your basic needs of today.
You're talking about some kind of "workers of the world unite" type stuff, which is not where the parent had any intention of going.