[That off-handed comment feels like it has more behind it, and Qrow raises an eyebrow, but he won't actively press Chiron. He just files it away: there are questions about Chiron's home life that Qrow has not had answered.]

I'm not going to deny that a bed under a solid roof's got a treebranch beat any day of the week. But monsters are thick on the ground in Remnant—thick in the air, too, but not quite as much. A tree's safer for a nap than the ground when you don't have anyone to watch your back.