I fully agree, but You Tube is a weird one for two reasons:
1) for some of reason, blocking YT is not working on network. I need to figure it out. This problem could be limited to me.
2) YT is used by various educational sites to just w videos. So, if I block YT, they stop working. Note: I’m not referring to visiting YouTube.com directly, but embedded videos in other sites. So, this makes it hard to block YT.
What I have done instead is not installed the YouTube app on the TV and settop box. This has somewhat controlled YT use, but not fully unfortunately.
I use yt-dlp (the maintained fork of youtube-dl) for school videos and put them on our in house Jellyfin.
If we can’t do that I email our teacher. I would rather them miss homework than unban YouTube. Schools need to stop using addictionware sites to deliver videos.