I live in a snowy clime. Likewise, the roads in our neighborhood are infrequently plowed and have a 10 to 15-degree incline. As such, I've pulled a lot of vehicles out of the shoulder after they've become stuck. Why? Because they often don't have winter tires, or winter tires with spikes.
We, thankfully, have the latter.
But folks often forget that they need winter or sometimes spiked winter tires, even when the roads are well-maintained. For example, roads going into parking lots for OHV travel, i.e. the spots people love to unload their winter toys onto. Why? Because what inevitably occurs are news clips or viral videos like the below of trucks or SUVs pulling trailers, usually with snowmobiles and UTVs still in tow, and then failing to get up even the most minor of hills when those roads freeze over or receive just a dusting of snow.