Well i think the point is that today people just watch movies that have “aTleAsT 7 or 8 on imDb” or the top ranked show/album on [insert arbitrary streaming service] that week, and are never exposed to anything outside of the mainstream realm = Everyone you meet is just a clone of the person next to her/him.
On paper you are correct; You’d think people have vastly different tastes and interests but in reality they just watch/listen to/do what everyone else is watching/listening do/doing.