I would agree, in many respects, that unpaid internships are glorified daycare. It isn't like a tech internship. No one gets a project to own. The reason these roles existed at all was because it didn't cost anything. Paying them would've required justifying the cost, and there was no way to justify these kids.
I'd say interns were productive maybe 15% of the time. They just hung out and if you needed something done you didn't want to do, you could pull one to do it. Usually physical tasks (track down a wig) or internet research. Yes, they'd occassionally do coffee/lunch runs.
In my experience, I found the nepo babies to be the least entitled workers. They never balked at what you asked them to do, and understood the assignment quickly. They had a great attitude. They often went beyond what you asked. By contrast, other interns usually had some kind of attitude about it or required way more hand holding. I was pretty surprised; common wisdom would lead you to expect the opposite.
I looked them up recently, and many of them are doing small film stuff shooting in LA.