Well, I understand what you're saying but disagree to some extent.
It all depends on how you look at it. Yes, a run of the mill 9-3 or 9-5 is a great daily driver, and lots are. However a Viggen/Turbo X/any other special edition/something you modified to hell and stuck a ton of money into I think deserves a little more care.
I won't drive my Viggen in winter because there aren't enough left to take one that's a pretty good example of a nice one and ruin it... But to each his own.
My Dad agrees with you though. A car is a car. Which is why the sales people at the European Dealership he keeps buying his cars at make this face :ahh: everytime he buys a car and says "yeah that's what I'm going to drive every day. The last one was his '99 996 Convertible (back in '01), then he had a few in the middle that weren't anything "special" and now it's his '09 SL550 Sport... And yes, he does add snow tires and drive them in winter. Then again he don't keep them more than a few years either.