I don't like riding in the rain - primarily because I don't like soaked feet.

reason #2: pavement paint gets slick, and can remain slick after the rain is gone. (been down [on] that road)
reason #3: rain seems to flush up out of the surface of the pavement tiny steel auto tire threads that cause flats.

But, when you get caught out, you only get wet once. Then that part is over.