Not following this. If it were obvious, all of the US military vehicles with pneumatic systems would use pneumatic wipers. They don't. I assume electric wipers could integrate some sort of clutch.
Edit: Apparently, high end electric wiper motors use self-resetting circuit breakers to deal with frozen wipers.
I know that most people here are from SV where corrosion, snow and potholes don't exist but come on, this one should be obvious.