That's why people want walled gardens and better encryption. They'd rather have hardly any reach than no control.
People want to own their data, and you don't own something, if you cannot control access to it.
Discussion
When you put something on the internet where it is accessible to some then it could become accessible to all. People think they're in 'private' Discord servers, meanwhile there's a bot in the same server scraping everything. Similar thing would happen with a relay.
https://www.404media.co/a-spy-site-is-scraping-discord-and-selling-users-messages/