I like the apex-predator and sensory thing tied to the ridges, but using that as the reason why they are hairless doesn't feel reasonable.
Maybe all the other Klingons choose to grow hair because its something like, 'Hey look at me, I'm still this badass even though I'm handicapping myself.' But then they'd probably bag on Klingons that don't do that. It's funny, each time they offer an explanation I feel like they're going, 'This is the one they won't be able to pick apart!' and then five seconds later this thread is 50 pages long.
Maybe all the other Klingons choose to grow hair because its something like, 'Hey look at me, I'm still this badass even though I'm handicapping myself.' But then they'd probably bag on Klingons that don't do that. It's funny, each time they offer an explanation I feel like they're going, 'This is the one they won't be able to pick apart!' and then five seconds later this thread is 50 pages long.