nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq2akj8hpakgzk6gygf9rzlm343nulpue3pgkx8jmvyeayh86cfrusf8t2fq that simply isn't true, though.
If you self-host, your content can be seen. So anyone can take a copy. Nuke your disk if you want, but the Internet Archive will still have copy. As will anyone who hit ctrl+s.