I agree. A lot of people use the 4wd ability to go fast in snow as an excuse to go fast in snow and ice. That ability should be used to merge safely, get through slippery intersections and climb hills. Test after test have shown that 4wd with crappy tires will out accelerate a 2wd with snow tires. That too is a recipe for leaving the road. Another factor is the traditional, usually older 4wd with a partime system that when cornering or sudden lane change with a fixed differential on packed snow and ice where the differential tries to keep the front and rear spinning together, in itself can throw you into a spin. You can bet though, that the majority of 4 wds off the road are those using 4wd as an excuse not to use winter tires or even decent tires and worst of all, an excuse not to slow down. I have argued that 4 wd allows a person to drive slower and more safely by not having to get a run for hills or roll through snowy intersections when your too afraid to not get going again. You use 4 wd to your advantage, not disadvantage.
My best friend, for years complained about his Subaru not being that great in wet snow and one time “causing” him to leave the road. After a few years of badgering, he finally got snow tires. “oh, I never thought they could stop so well” was the first thing he said to me after his first snow storm. Dahh ! And, this can from a guy with a measurable IQ greater then that of my entire immediated family. ;=)
I have noticed too, that that the most cautious drivers seem to be those with cars that are the best prepared for winter. They want all the advantages along with reduced speed.