I'm not telling you to never, ever follow through on those late-night ideas. I'm in no position to do that. I've been known to work at 3 a.m., and at least half of all the major life decisions I've ever made have been influenced by the kind of sleep deprivation that would warrant its own Creepypasta yarn. If anything, I'm a cautionary example. See, there's a fine line between "awesome" and "potentially dangerous awesome," and those late-night ideas our brains give us are dancing a jig along that line, naked, floppy, and pooping all over the place.
The thing is, the human brain is a notorious asshole. One of the many, many, many ways this manifests is its love for getting creative at the worst possible moment, gleefully rubbing irresistible inspiration in our faces when we're as tired as humanly possible. Sometimes we bite: That golden idea about a surefire method of breeding dachshunds into dragons may be enough to keep you up all night, and over time it may even develop into a condition called creative insomnia, which is exactly what it says on the tin. Incidentally, that's not even the worst downside of late-night idea orgies. That would be the fact that they can actually decrease your intelligence, both physically and emotionally.
Yep, all those great 2 a.m. ideas are just a ruse by your brain so it doesn't have to work so damn hard.