The problem here is "network effect" leverage on society.
When you choose not to use Youtube, you are choosing to not be a part of a large part of society. This is isolating. Whether that isolation matters to the individual in question is highly variable.
You might be able to easily forego it. But a kid - ostensibly uninformed, not able to reason well enough and "not able to consent" - who's teacher sets an assignment to write about a youtube video has an overwhelming influence to "simply do it".
Should large parts of society including institutions know better and do better? Sure. But in practice they don't.
When you choose not to use Youtube, you are choosing to not be a part of a large part of society. This is isolating. Whether that isolation matters to the individual in question is highly variable.
You might be able to easily forego it. But a kid - ostensibly uninformed, not able to reason well enough and "not able to consent" - who's teacher sets an assignment to write about a youtube video has an overwhelming influence to "simply do it".
Should large parts of society including institutions know better and do better? Sure. But in practice they don't.