Why not to have a website then? That's the only thing that where the content is truly Yours.

In NOSTR, even though yes there is more than one relay, but you still need their permission to publish; and yes, you can run your own relay - but you might host your own website too - no need for new apps and protocols to do this

The difference is that on nostr you can have immediate interactions with others, you can get their comments, you can message with them, etc.

In your example you can think about nostr as a protocol on top of "your own websites" that allows all people with "your own website" to effectively communicate and live interact with each other. And creating "your own website" is just a matter of clicking a button in any nostr app that generates private key and public key pair.

A few differences: you don't need to learn how to self-host (this is why centralized services became so popular in the first place), it's two-way communication, and the point about relays is that as long as just one allows you to publish (which is very likely, and even if there's none, you can host one yourself), you can publish.