*However, 400,000 years isn't really that long on an evolutionary scale and if the young and virile moths aren't killing themselves, then it wont be selectively bred out of the species. Natural selection is only concerned with survival of the most fit reproducers. Any disease or affliction that affects a being after it has produced offspring is that being's own problem.
Yeah I think this is what I'd argue, I mean it's not like it's a high percentage that spiral into fire. I would imagine those at the most risk are those that have the "moon" positioned at a small angle relative to flight, ie directly in front of them. This would reduce their adjustments, compared to a moth who views the "moon" at 90 degrees.

I did have a quick look at the wiki page for moths, and there's only a couple of species that have evolved methods of defence against bats. There's one which instinctively drops a few inches when it detects sonar, and there's another that emits clicks to throw the bats off the scent. They're taking their time to evolve against predators, so it doesn't surprise me that fire isn't an evolutionary concern for them either. Maybe the ones who survive are the smarter ones who realise it's not the moon when they see how fast the angle is changing. Maybe in time the moths will stop dive bombing fire. I hope not, it amuses me.