If that is your attitude during winter/snow then you shouldn't ever be riding on the road.
Cars drive a lot slower in the snow. They are paying MORE attention than normal. There are also less cars because they don't want to be driving in those conditions. It is also nicer for you if you do have to bail because there is a two/three foot high snowbank next to you.
I would prefer a low speed slide than a 50mph crash.
The other day all the drivers were all worried about the drive, I saw numerous cars wheel spinning trying to get through intersections. My ride was great - about half an inch of snow which had been packed down by traffic - so no slush and no ruts. Also I've been riding throughout the winter for 7 or 8 years and have never once even come close to an accident.
I think a lot of the scare of riding in winter is from car-drivers who have the wheel spinning/fishtailing at intersections. That is the one area I pay more attention to and let the cars go through first.