Not agreeing with drivers, just guessing as this does attract a lot of driver rage.
Me? I have a bike and a car in Seattle, but almost always walk or take public transit. It's low stress that way, which I like. At intersections, cars and cyclists both hassle pedestrians in their own way. The cars, because they are too accommodating and make you feel almost obliged to run across the street when they stop for you even though they could have easily kept going without coming close to you. And the cyclists, because a horrible minority of them are totally blind to pedestrians in a way that drivers in Seattle aren't. Most cyclists are fine, but you've got to stay on your toes for the few that aren't.
My commute to work is usually uneventful, about 10 miles mostly on dedicated bike paths along with many other commuters. It’s a few miles longer than it should but it’s definitely the safest route to work.
In plenty of the areas mentioned (Issaquah, Renton, etc.) there isn't much of a shoulder to speak of. When I take a longer loop around Lake Washington+Sammamish, here's one of the roads I go down:
And take the car lane fully not half way.
It's technically illegal to ride on the sidewalk