How come shy guys never ask women out?

I have talked to a lot of shy guys, these are some good guys who could offer a lot to a woman. But none of these guys will ask a woman out. Some flat out refuse to do it. Some even told me "We know women will say no, so we don't even bother with women at all." I find that sad that these guys won't even try because they're good guys and very pleasant to be around. I told them not every woman will say no, but they don't believe me. How do these guys just give up without trying?
How come shy guys never ask women out?
Post Opinion