Tor did a good job with marketing and optics early on, to make its intended use cases highly visible.
> Tor did a good job with marketing and optics early on, to make its intended use cases highly visible.
I used to work on Freenet. The mechanic you're pointing out doesn't have to be the dominant effect if the system performs as well as the alternatives. If everything else is equal (speed and convenience), users would of course prefer to have more security than less. If the performance and usability is only slightly worse, users may still be willing to choose security over that (e.g. Tor) - people today are becoming more aware of just how much their data can get abused.
Unfortunately for Freenet the technology wasn't capable enough - the security wasn't worth the usability and performance tradeoffs for most users. That doesn't mean strong security inherently attracts unpleasant types.
If the hosting is anonymous and censorship-resistant then you'll get every type of content, but for anybody to use it they would first have to find it.
Then you have a slew of independent discoverability portals. Some are created for child pornography, so the FBI hacks into them and then uses them to arrest everybody there. Others are created to replace Tumblr and YouTube and refuse to link to child pornography, so child pornographers have no reason to go there and the people disgusted by child pornography can safely use them.
But setting up a discoverability portal is a lot less expensive than setting up a hosting service (because a link uses much less bandwidth than high quality video), so there should be more competition, and in particular it should still be difficult to censor anything that has more than a modest amount of popular support.
For convenience, we need m3u lists of video-chunks and a simple player shipped, since browsers cannot play m3u out of the box.
Even with their site saying one thing, the result in the media is clearly different. It's got a public reputation for only two things to those who've heard of it: darknet markets and ransomware payments.