Having the event is useful of course, but I don't think it solves the underlying privacy issues because relays still can decide to keep the "deleted" notes, secretly or publicly. And non-tech newbies gonna see the button and think that it works like a delete button on Twitter.
I really like the idea that people have to think about what they publish on Nostr.
Where posts are full of embarrassing ideas or typos, deleting is a sledgehammer to crack a nut. Surely an easy solution is, replying to yourself and putting in a disclaimer or explaining yourself better. That subscribes to the idea of owning mistakes and showing growth.
But where an error is disastrous, accidentally posting a private key, that needs some sort of consensus from relays to delete or within apps, some way of parsing and flagging before a final publish. Like where say URLs aren't recognised on some forums etc
