Well, I like some drama but I really hate guys crashing when it's not their fault.
You can crash at any time due to circumstances beyond your control, if others in the bunch crash.
This isn't oil on the road like Spa or Aia in 2010, or tacks like Peguère in 2012. This is rain. Oil, thumbtacks and their like are things that teams should not have to take into account in their preparations and plans because they aren't part of a bike race. Weather, on the other hand,
is. It happens. And the onus should be on the organisers to resolve it, like Martello 2014 or Tignes last year. If the péloton has decided that the fresh rain is causing too much surface water and it's not safe to descend at race pace, then fine - so long as they race when they hit the bottom and the danger is not there any more. If they decide that precarious downhills with ravines with heavy surface water is too dangerous to race, then that's fine. That makes a lot of sense. But if they then decide that flat roads are too dangerous to race if they're wet, we may as well cancel half the calendar.