You sound like somebody who hasn't touched a bike since childhood, if ever.
No, cars can easily be used in much worse weather than bikes.
But should you? Driving even just in rain makes your car significantly more dangerous, especially if you're dumb enough to drive at high speeds. Besides, I've biked in some pretty extreme weather, including a blizzard that constantly blasted ice at me so much I had to keep my hand in front of my face the whole time. Was I in danger? Probably, but there's still not actually that much difference between weather that bicyclists should avoid, and weather that motorists should avoid.
The biggest difference being how much danger the latter poses to others in addition to the driver.
Worse. It may sound surprising, but in a traffic accident being inside a car protects you more than just having a helmet.
You're so well protected in your little bubble... unless your little shelter is smaller than the monstrous trucks that are on the roads now days. Now you're pretty much in the same boat as the bicyclist, there's always a bigger fish. So I guess by your logic we should actually all be driving the largest trucks possible.
And that touches on the crux of the problem. Your overly sheltered lifestyle disconnects you from realities right in front of your face. See in these crash scenarios the bicyclist is likely thinking as much about the safety of who they might be crashing into, as well as their own safety. Usually, yeah yeah assholes are everywhere, but the fact is the bicyclist is significantly less of a danger to both themselves and others.
Motorists are as dissonant as meat eaters. Any leap of logic to avoid confronting that you are part of the fucking problem.
I wonder if that thing is even legal to drive.
The pic I just posted is of a model that likely doesn't even have a motor in it. Of course it's legal to drive. Don't even need a license.