I've crossed a lot of water on the back of a motorcycle. It's a fun thing to do when you're out in the woods, as it tests your abilities to the max. There are slippery rocks, unseen ruts and holes, large fish, and sometimes even bears. But there's also a time and, far more importantly, a place for crossing water. The backcountry is the place to test those skills and your machine.
What aren't are floodwater-choked city streets, as they make the hazards of the woods look as if you were a full-on Bubble Boy, encased in an impenetrable protective layer.
Seriously, floodwaters are no joke within the city limits, as there's countless unseen, and far more dangerous hazards than in the woods. One youth motorcycle rider recently found this out in Bangkok, Thailand, when he was attempting to get through the flooded street with his motorcycle, only to grab a concrete barrier with a live wire running through it, and electrocuted himself to death.
