Yep - losing control on ice on a bike can be truly terrifying, but you don't weigh much and aren't moving that fast. And there is that nice thing about being able to just pick up your bike and bail. Can't do that with a Jeep 
What (still) terrifies me a little about driving a car, which I've only done for the past two years or so, is the potential for seriously harming other people. I still have a little trouble wrapping my head around the thought that I'm barreling down the road at 3 times a healthy biking clip inside something that weighs half a ton. If I swerve and hit someone, they're dead. 
I feel that as a cyclist I'm forced to judge road conditions more carefully and adjust my speed accordingly, because 2 wheels are less forgiving. As a driver I tend to take reasonably good road conditions for granted.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett