But in any case, romance is absolutely the basis of a relationship, otherwise you could marry your best friend. If you don't have it, you're likely to be dissatisfied. Of course it can wane - but that's also why you work to get it back, because if it goes away for good, your relationship is going to suck.
Lots of people never who never really "knew" successful long-term relationships only associate love with those, and that's indeed somewhat immature.
the absurd situation where you seek divorce because you’re no longer in “love”.
In short, it would be absurd to mix up infatuation with love.
The bigger problem as I've seen over the years with people is that they confuse the two with -other- people. A person married for 5 years becomes infatuated with someone else, which of course means they love them and not their spouse anymore. In their eyes, at least. And the problem with that thinking should be immediately apparent.
It's a complicated subject and I'm not an expert by any means, just sharing my observations.
> [a] situation where you seek divorce because you’re no longer in “love”
is not:
[a] situation where you seek divorce because you’re no longer infatuated
One might well call the second situation absurd too, as, if you knew it was absurd then you shouldn't have wed, but it's still a different absurdity.
My expectation is that it's unlikely in the long-run to fall out of love if both parties still nurture the relationship and invest themselves. But maybe I'm wrong and it happens anyway.
In this case, if reality doesn't meet expectations, then divorcing just to try the same thing again to get the same result is absurd insanity, instead the expectations should be adjusted.