I kind of do and don’t worry about this. Ignorance is very real, and there are definitely those who cultivate it as a political tool. But that has always happened, and it has always been subject to the same fundamental limit: there’s no such thing as a smart stampede.
The only thing a mob is good for is smashing stuff. Kleptocrats might find that temporarily useful to cover their looting, but it’s no basis for a long-term masterplan. It’s the kind of plan you resort to when you think your conspiracy is dead already.
What I don’t worry about, at all, is that the next potential Karl Marx or Martin Luther King is out there being turned into a vegetable by YouTube. They might be pissed off at how much bullshit they have to wade through, but they’re going to find the ideas and viewpoints they need, on YouTube or in a library or wherever they have to look.