I don't think this was too strict, maybe I made it sound that way, but it was not like he forbid him using windows, it was just that he's using Linux, his son got his old laptop that was running Linux and they didn't have a windows license, so his son was running Linux as well. He's also doing fine on Linux and doesn't dislike it or anything, the only "problem" was that he wanted to play Fortnite which does not work on Linux. He's also getting along fine with Linux, especially on fedora where he doesn't need the Terminal.

What I wanted to say with that comment is that you can't make your kids to learn and use Linux like most of us probably do. For most people an operating system is still just some black magic on their computer that makes the browser or their games run, they don't care how it works or if it is secure or using the latest software. Most people just don't know and don't care what an OS even is and the same thing goes for kids imo