Yeah, but why doesn't the profile metadata reference that directly? It's the first thing you need to know about a profile in practice. Because of sync issues or something?
#noob asking questions her...
If you can see the kind 0, then you know at least one relay they use, as it's the one with that profile event on it. In practice, the hard part is finding the profile event. So, the first thing any npub needs to publish is actually a kind 10002 relay list.