salt on the roads destroys cars. If my car can last a year longer before falling apart that is a lot of monea saved for me. I drive my cars to the end most of the time. Plus a clean car makes my wife happa which is itself important.
It is so simple to come up with excuses. It is raining. No need to go. We are in spring and here it means the dirty season, no need to go. Or it is negative temperature outside, it probably does not dry...
It takes roughly five minutes depending on how long the queue is, so when I'm out running errands I'll stop in. Keeps the road crud (and most importantly, salt) off the car so it lasts longer.