Marty, completely understand where you're coming from. I do get you are very proficient at driving in those conditions and want to point out my comments were directed at most of the drivers in the PNW...which is why you will see some of those in the ditch, just not very much experience unlike your experience.
When living there, I was out on the coast. The first 3 years I commuted into the west side of PDX which meant I traversed the Coastal Range, 155 miles a day. Sure, the Coastal Range is not very high but it does get adverse driving conditions every winter. Add to that, my boss was not very forgiving so I made the commute rain, sleet, ice or snow. Remaining 6 years I was driving to the airport just about once a week. Spent a number of times visiting accounts in and around Seattle. How a lot of the other drivers drove in those conditions was baffling to me and has a lot to do with the number of those, even with 4WD, who end up stranded.