It is STUPID AS HELL because in almost all cars, it operates IN LIEU of BLINKERS. You know, those critical safety devices that indicate you may be about to change lanes or turn? In traffic, to your side, it constantly looks like you're signalling to change lanes or turn because someone next to you can't see the far side of your car.
Hazard lights are for DISABLED vehicles that present a hazard to other drivers on the road. Like, if you are stalled out, or blew a flat, or stuck in a ditch, or already had an accident and can't drive away.
They're not to warn everyone else you might be paranoid or a terrible friggin driver. If you're such a terrible driver that a little rain makes you a road hazard, then PULL OVER on the shoulder and turn your hazards on until it quits raining.
Yes, this is a pet peeve of mine, and even worse are the stupid LEOs that actually endorse this dumb crap without thinking of the danger it represents.