I'm going to lead by telling you that I am NOT ant-screen time. That's not me. I'm a bit of a nerd and a couch potato myself.
I have a 6 year old and a 9 year old. Since they were old enough to watch TV they have demanded the same episodes of the same shows over and over. My son comes home every single day and asks to watch the same 3-4 episodes of Bluey. My daughter watches the same 2-3 shows on a loop. She does mix up episodes of each show, but there isn't much variance in her shows.
In contrast, "bAcK iN mY dAy" we watched what was on. I'd get 30 minutes of GI Joe every morning before school, but a different episode every day. I'd come home and watch Rescue Rangers or Duck Tales, different episodes everyday. In the evening the sitcoms only aired once a week. So the shows I was watching in the evening varied by night, and the episodes were all different from week to week.
What I'm getting at, is that there by having access to literally everything it allows them to have zero diversity in what the kids are watching. They watch the same three episodes of the same single show, maybe 2 or 3 shows, over and over and over. When you're watching TMNT as a kid it takes your imagination to a different place than Tiny Toons, and Tiny Toons takes your imagination to a different place than The Jetsons might. Whereas the same three episodes just keeps your brain frozen in one place.
I don't know. That popped into my head the other night and I really can't shake it. It's been tough trying to get my son to watch something other than Bluey. Part of me wants him to move on and experience something else, but the other part of me doesn't really want to fight that battle.