"The sick human had only one request. To see the flowers from their village. But there was nothing we could do." - Are we *absolutely* certain that they're not talking about buttercups? Could Chara have been asking to see the flowers from inside the village? ....Because I cannot stress enough how much the flowers here in England this spring looked exactly like every "golden flower" in the game (save Flowey). Knowing about the plan would also shed more light on Asgore's rage.
We can be absolutely certain.
Like, listen. The problem with the golden flowers was that Chara couldn’t get to them. That’s the whole thing. They are ‘the flowers from the surface, the first of which that sprouted after the queen left, in the garden.’ They did not exist in the underground prior to that moment.
Buttercups did exist in the underground. They were easy to access! Chara ate them, in such mass that they died. Therefore, they’re not the golden flowers.
We’ve had this talk already …