When I was a kid, if we were out playing, and someone said: "My mom says I'm not allowed to get wet," well, guess who got wet.

In my view, bikes are a lot less delicate than we tend to assume. They can get wet. I ride in all weather, and my bikes have not suffered for it. I bring them into the garage and let them drip dry. The only time that rust is an issue, is when the roads are salted during the winter. The chain can tolerate a bit of light surface rust, though it might be unsightly. There may be some plain steel fasteners that show a bit of rust after a season of all weather cycling, but that's cosmetic too.

For all weather cycling, there's always the question of chain lubrication, with different "camps" preferring thicker lubes, or dry lubes. That's worth reading about, since there have been plenty of threads about it, and it's not worth starting yet another one.