I agree that this is the one thing I'm unsure about. But: a lot of people once said this same argument about cryptocurrency and were amazed at how technically literate drug dealers could actually be, given the right incentives.
Regardless, as of recently they are making everything a one-click process: https://tlon.io
Extremely obscure dark corners of the web have always existed. They're not novel, and in general they have not been particularly dangerous as their niche is extremely small.
When I was 10 I could already find The Anarchists' Cookbook on newsgroups trivially. Back then it was trivial to find thoroughly illegal porn, racist forums, and all sorts of things that never decanted into the current state of affairs.
Crypto only got popular when it became easy. Before Coinbase and some others nobody outside of the nerds or darkweb was talking about crypto. Even now most people don’t understand it even though they’ve heard of it.
One side effect is that these technologies very quickly only become used by the people who really need it. Crypto in general has a huge stigma of being used by drug dealers, money launderers, and the like.