I think of outbox as "putting stuff where it's supposed to go" which is a little tautological, but basically requires defining where any given note is supposed to go. Not defining a "correct" home for a note basically guarantees failure to find it when it's needed. Outbox as currently defined doesn't cover all cases, just (public) social media.
I see it the same way. Having SOME defined way of determining which relays to use, rather than having NO defined way and blasting. That's all. It doesn't have to be the current NIP-65 advice. But it has to be something. Or else we end up with a network that uses 1000x more resources than it needs to. But I guess I should expect bitcoiners to not care about using 1000x more resources than you need to. 🥺