Nah, you see, this is clearly Tobs' deep and analytical writing trying to convey the superiority of his definitely-not-Japanese-inspired of foxes that are ultra-nationalistic colonisers (I wish I was joking) that have to grace your people, the 'Northerners', the 'natives' of this land with their presence and do so by unironically trying to suck your soul--I mean, life essence in order to prosper which in no way shape or form makes them similar to the demons.
Their decisions aren't logical because they clearly are the more civilised people as opposed to you, the MC, and their merry band of companions that have singlehandedly brought down their foes, brought back their Esteemed Leader, be cool with their god and prove to be overall powerhouses, hence precisely why your people are 'backwater.' Clearly, getting shit done is far beneath them.
By the way, Kiyoko actually willingly handing over Kinu to Nakano (if Hime route) genuinely baffles me since the last build I played was from last year and am currently in the middle of just running through the current build. Now I am definitely determined to just keep her in the amulet. No way. It's like, what, the moment you return to being a 'den-mother', you revert back to your old kitsune ways? Is the MC just chopped liver? Did spending all that time in the amulet mean nothing?
Nah, clearly the MC's 'Northerner' self is not suited for this sort of thing. I mean, actually wanting to support your wife during childbirth is 'weird', right?