Nagato's life was not turned into having no hope from his damn dog dying, If it was just his dog then yea it would be been fairy stupid yknow like it would be obito and rin dying, Who mind you never liked him
Nagato's life was always horid, he lost his parents at a young age then his dog then his best friend and organization
There was alot more to nagato's descent to who he became then just his dog unlike with obito, Where that's literally all the reason given
Imagine pain ever saying, it's because you let yahiko die as a reason for literally anything
Obito has always been a dumb villain with a very stupid motive which makes no sense given the context of the narrative, he wants to create a world where he can be with rin but yknow edo tensei are a thing so the goal makes no sense. Why not just revive her instead of having a fake dream version of her
and as both me and you pretty well said, it's only wrote this way because kishimoto made the around 25 yr old man have a crush on a 9 yr old female, to begin with
Could of just had her age in the afterlife or have that be some general rule to avoid characters making out of character choices like obviously the reason why rin was not revived was obito having any sort of relation with a dead body 9 yr old is way too dark for naruto but again as stated before should of just wrote the story in a way where situations like that arent contextually likely for the characters to make