Because there's a legal reason to want to keep your wheels spinning while you drive off, it'll be labeled "Snow and Ice".
What are you talking about?
This isn't rally Sweden and you don't need to be shooting up rooster tails of snow.
The absolute last thing you want on snow or ice is wheel spin.
Anytime you see a traction control system with a "snow" mode, it does any combination of:
1. desensitizes the gas pedal
2. starts you in 2nd gear
3. limits engine power
4. traction control reacts much more aggressively to prevent wheel spin
5. up-shifts your transmission at lower rpm to keep wheel spin down
Sand and mud modes will do the exact opposite, because you want high rpms and varying amounts of wheel spin to keep you moving on those surfaces.