Personally I would say this sounds mega-restrictive in a non-constructive way. To each their own with parenting of course, but I hope others don't imitate this person's choices. This sounds limiting to the point that the kids might grow up having limited tech skills and no familiarity with the shows, movies, and games that their peers will be talking about.

I remember growing up watching Discovery channel specials like Steve Irwin, learning a ton of history playing Age of Empires (that led to me having a love of reading historical biographies years later), and just watching movies in general that led to me loving writing stories.

However I have also seen young kids do nothing but waste 7+ hours a day on youtube watching imbeciles splutter about their opinions on tabloid drama or reaction videos.

So my point is that I think it's less about total restriction and more about guiding the content.