Perhaps the issue with "the Internet enables self-learning" is that people just read the arguments they like and dismiss the ones they don't like; however perverse it is, there's some merit to an authority figure/your friends in a classroom saying "you're wrong" -- but then again, in the Taliban-ruled areas of the United States they teach that evolution is a lie.

I can see how a manifesto saying "the truth is, women are [bla bla bla], therefore [bla bla]" can make sense in a superficial level (and gives twats like Jordan Peterson an air of intelligence), and can be persuasive to incels.

Of course suppression isn't the answer either.