That's a fair point. I'm going to make an assumption here but those systems aren't moderated or controlled centrally? So I see two issues with these if they become popular.
1. This only increases misinformation since there's no censorship at all
2. What prevents people from using the service for illegal purposes (I think this becomes a problem once services become popular)
3. Finally won't it just be banned eventually? If some court in any country issues a ruling to control it and it can't be controlled that will just escalate. Especially if it's something like pedophiles.