You see this with children and iPads. My kids know 3x what I did when I was their same age. It's as if something can finally fill their bandwidth, keep up with their thoughts, and answer those questions in real-time. No wonder they get angry when it's time to put away the iPad - they're engaged at a high level. Much like when I am programming on a sideproject and my focus is interrupted.
The biggest travesty is that we don't get more control over Youtube's algorithm. That we can't ban all Youtube videos with the word "Minecraft" in it, so that we can override their curiosity and say "OK, learn something else today."
Youtube's focus solely on engagement above all else is the biggest tragedy of the modern world. Such a massive opportunity for education - e.g. inserting more academic videos in between entertainment. But we don't get that feature, or any manual overrides for more control.
If any Youtube engineers are reading, please give us (the parents) more control! Youtube, do better.