Dunno, as it were. Ye don't run into many Garleans that ain't trying te kill ye, and even fewer ye can actually call friendly. I'm sure theres some scholarly discourse on the matter but I ain't privy to it.

If I had te guess though, I'd guess its cause there's less aether wherever they crawled out of. Ye can't learn te use a thing if ye don't have it te use.