Unfortunately YouTube captures the full set of extremes and everything in between, so I don't think it's fair to label the entire thing a cesspit of stupidity.

For every MrBeast there's a 3Blue1Brown. For every recycled clip from a well-known TV series uploaded purely to drive ad revenue for a bot-controlled channel there's a fine art restoration video showing a very niche process with a real, skilled human behind it.

And so on.