I personally think it's more or a lack of understanding what they're doing. I find even my male friends who have no idea what the hell a car's all about understand that they're operating 1.5-2.5tons of steel and plastic traveling at over 30m/s and attempting to keep perfect control of that much force with some shit we get of trees made into a circle. Internal combustion is nothing more than a series of explosions, and understeer + oversteer exist.
Combine that with guys constantly checking the mirrors because we're never not speeding, and you understand that we tend to take driving more of a thing in itself, not something you can do while doing other things like texting or spacing out or shit.
That's not to say all women are bad drivers. My mum holds oversteer better than my bitch ass does, and this is because she drove big V8 muscle cars all throughout the 80s, and a modified 351w bronco in the last 90s/early 00s.
My sister in law, however, has totaled a shitton of cars and simply does not know how to drive. My normal sister doesn't crash cars, but that's because she's bloody insane. I'm the teenage male in the family and her driving scares the shit out of me. All throttle all the time, and when there's a gap maybe big enough for a bicycle - that shit's hers.