Because there's a legal reason to want to keep your wheels spinning while you drive off, it'll be labeled "Snow and Ice". Try driving away on a slippery surface on a slight inclination with a car with traction control. You'll never get anywhere, unless you can disable it.
I agree with you on disabling traction control, but you are mistaken if you think that spinning helps you on slippery snow. I have lots of experience driving both front and rear wheel drive cars on snow. If it's slippery, and you start spinning uphill and don't recover before losing too much speed you're pretty much bound to back down and try again. So you avoid spinning as far as possible. In fact, a sure sign you're a (technically) bad driver is if you push down on the pedal when you start spinning, you'll lose speed and eventually stop. Mind you, there are plenty of drivers who don't get this and just frantically increase the revs when they start slipping, and it's very annoying being behind them when that happens so you have to back down as well.
The same goes if you get stuck. If you spin you'll just dig yourself down deeper, without getting anywhere. You have to keep from spinning, creep carefully along, and employ a rocking motion by using the clutch in a periodic manner to boost yourself out if you can't advance*.
You achieve all this by carefully coordinating revs and clutch**, while using "the seats of your pants" (feel) to gauge traction. When I learnt to drive (in a place with lots of gradients, and lots of snow) there was no traction control, and the first one I tried years afterwards really sucked. My favourite example is the 2 km, 12 degrees uphill section of road going to the family cabin, it's really a challenge during winter without dragging out the snow chains [which of course is a cop-out thing to do
* I've also driven quite a bit in mud when living in South America. Mud is different, in some kinds of mud you can get a boost from a controlled wheelspin at the right moment. Very wet organic mud still behaves pretty much like deep snow, though. That was not what you were talking about, however.
** Good luck doing any of this in an automatic. I've driven a newish Mercedes which supposedly had a very advanced automatic transmission / traction control on really slippery snow-covered ice, and it still sucked bowling balls through garden hoses (maybe a bit less than other automatics, but I avoid them as far as possible). I could probably outperform its traction in a stick shift with my eyes quite literally closed.