Ah! This is a nuance that I didn't understand previously, thank you for bringing it up! Would proper protocol be to boost and broadcast, or would just broadcasting it suffice?

That's a dumb rule.

boosting references the note on your list of kind 1 events to your relays, but broadcasting copies the event to your relays nostr is dumb lol

I think most apps will broadcast on a boost. YMMV depending on client of course.