Who knew the 6.15 Omega Quests… (Spoilers)

[Iscah]

Fears of a "death by utopia" felt similarly absurd when they were founded off a single vague statement that one civilization supposedly eliminated sorrow only to drown in apathy...

I think a key thing here is the writer's outlook, because I'm not sure who it is originating from specifically, but the idea of a civilisation becoming too comfortable and grinding to a halt and decline comes up right back in the first lorebook describing the rise and decline of the Allagan empire.

So if this concept is something a core writer holds as a concept to be a natural course of civilisation, then they may not feel a need to foreshadow it heavily when they use it again.

Maybe it's Ishikawa, maybe it's someone else, maybe it's a pervasive idea among the dev/writing team. But the earlier mention of it makes me think it's something they saw as already inherently possible, not a scenario they invented for that one setting alone.