Notice how he contrasted “could be gone” with “can’t be stopped” lol.

Because content absolutely can be gone on Nostr. You don’t own your content here. You give the content to relays with no guarantees of uptime or permanence. nostr:note1npsl9pafm5gu4705hhsgs4x9kyeyx0r0xamvhjq4hpvw2x7rkpkqnd2seu