Nah I disagree with that. That speech definitely gave the vibe that she was heavily influenced by Tidus's revolts against tradition and such from earlier in the game. Like I'm not saying Tidus was actively pushing her to do it but at the same time it's not something I'd expect Yuna to do without playing copycat. Like I'm not trying to belittle the scene cause the scene is good either way regardless of what led Yuna to do it, but it does matter in how much it reaffirms my feelings that Yuna doesn't ever really stand entirely on her own two feet. Now I'm not saying a character being influenced by other characters is a bad thing but in Yuna's case she never feels like anything special she does comes straight from her.
I don't recall the "believe" thing offhand, but I'm pretty sure I'd feel similarly about that.
Also I'm not saying the naive thing doesn't come into play, but it isn't presented as a flaw. It's not "Yuna you're stupid for doing this that's never going to work." It's "good try Yuna your heart was in the right place."
--
No problem!
This is a cute and pop genocide of love!