Understandable, sometimes I don't always Think about bay myself. It's not my favorite color, so sometimes it just slips my mind. I'm biased like that I suppose.
I also have no qualms about breeding for color, as long as conformation is still a determining factor. I used to breed for color myself several years ago. Taking solid mares, and pairing them with Paint studs that matched them well. Then I realized I don't really like paint, sept for Frame Overo.
Now I'm into miniatures where I'm finding out pony's don't give a flying hoot about genetics. XD These little buggers never stop astounding me as I research them.
I do understand the dangers of breeding for color as a lot of foundation Appys are being bred because they have a wild spotted pattern but thier conformation... ugh. Thick necks, no butt, terrible legs, but hey he has a large black leopard pattern, lets breed him. *sigh*. To me the idea is if the conformation is there... then go for whatever color you like. That's the joy of being an unique individual.
I like having a certain amount of knowledge in the color genetics but I would hate to know exactly what I was getting... takes the fun out of it.