For all I know, Nostr is a kind of social network with distributed identity.

The problem with publishing elsewhere is not that it's hard or can't give you reach.

It's the scientific metrics dictating your readership, job prospects and essentially your entire scientific career. Not only your ratings are affected, but also ones of your institution, so you have to play by the rules to have a job.

For your publication to count, it needs to be published in journals listed in certain international indexes such as Scopus and Web of Science. These indexes are, in turn, corporate-owned (by Elsevier and Clarivate, respectively) and the respective boards are free to reject (and certainly will reject) your independent publishing source.