" I don't know a man who is turned on by 'sloppy'."
Armpit hair isn't sloppy, at least not in itself. Beauty, for me, doesn't depend on makeup and shaving. It's something else, altogether.
I've known women who were shaven and unshaven. I can't see that it ever made a difference to me with regard to my attraction to a particular woman.
Maybe it does make a difference for some men. For me, it doesn't. There are far more important qualities to consider.
The bottom line is that human women grow hair under their arms. That's the way they are, naturally. If they choose to shave, that's fine. If not, that's OK, too.
There's no difference to me in a woman not shaving her pits that for a man to grow a beard or not. Who cares?
What about hairy-legged women?
Personally, I don't mind a bit of armpit hair but I do find hairy legs a turn-off.