Of all the people I've lost to motor vehicle accidents, most have been in cars. A few in motorcycles, and only one personal friend in a civilian plane. But the numbers are skewed. Of my friends who died in cars, some slid off icy roads, some (always teenagers) raced over the railroad tracks to beat the train, one, his mind on his work, drove across the divided highway into the path of an oncoming truck, and some were hit by drunks, by people distracted by talking, texting, or otherwise fooling around. We once rounded a western mountain road in time to see a car go over the cliff. There were bad injuries, but the only (immediate) fatality in that car full of party people was a toddler who wasn't buckled in.
The one aviation fatality was the result of a really stupid decision-- if that's what it was, and not an MI on takeoff. The autopsy results were inconclusive due to the crispy nature of the very experienced CFI. I have, of course, heard and read of many more bad outcomes, but we're talking about personal experiences, right?
So, it's easy for me to think driving's more dangerous. The numbers, though, don't support my observation. GA IS statistically more dangerous, almost as dangerous as riding motorcycles. But naturally, I'm inclined to say, "Yeah, but-- I wouldn't do that risky thing." Or "I'm more in control of the options when I'm flying, and nobody's driving left of center up there, not many drunks, etc."
But the fact is, life is risky, and hardly anybody survives much more than a century, even with the most careful living. I'm thinking that life swaddled in fluffy quilts, drinking green tea, and taking no chances might not be much worth living.