Professional experience? Not what I've seen, at least. I knew about half a dozen guys at USC in the film school, 5 of whom got good, well-paying jobs before graduation. One guy sold a script two weeks before graduation for $250K. All of them went to film school straight out of high school.
I don't know anything about USC, and little about NYU's film-making program. However, I briefly attended NYU (over 20 years ago), and knew a number of students who were in the drama program there (my roommate was in that program). Virtually all of them had significant professional experience, even the ones who were arriving straight from high school. A few had had significant roles in major films and Broadway shows, most had had minor roles in such productions, and others, like my roommate, had more offbeat but still "professional" experience.
My roommate had been one of the on-field "mascot" performers for a major league sports team for the last 3 years of high school, earning pretty serious money dressed up as some silly animal, doing comical routines at the games, and also doing a lot of off-site PR appearances. Hardly "serious acting", but definitely paid acting, and demonstrating long-term professional reliability to show up and perform energetically whenever and wherever she was supposed to.
But other than the students who arrived with major film or Broadway credits, I never heard of any of them again, and assume they didn't end up with significant acting careers. Technical skill-oriented film-making is a less shaky career path than acting, but there are still massive numbers of young adults trying to "make it" in the field, and most haven't the faintest hope of a career in it, even if they get a film-making degree from any but the top handful of programs. Most will end up wishing they'd studied something else, after they discover that their "career in film-making" consists of long hours at low pay, doing uninspiring things like re-shooting a toothpaste ad for the third time, because the ad agency didn't like the way the lights bounced off the teeth of the "actress" on the first two tries.