Nostr does not ensure content ownership for end users … it only provides for content to NOT be owned or controlled by anyone else.

The genius of this protocol is that users have choice to make use of any and all of the apps and services in a thriving and open market of independently operated products. Only by doing so can each user assure that their content is not controlled or manipulated on the network at large.

Nostr is true freedom of choice, which is the only freedom that matters.