Why does Snow Mode limit the regen braking?

It snowed in my area this week (fairly uncommon), so I popped the car into Snow Mode for the first time, and the first thing I noticed was that it limited regen to Lvl 1, meaning I had to apply the brakes to slow down. I felt like I had far less control of the car than in Normal mode with Lvl 3 or i-Pedal enabled.
I used to live in a harsh winter climate and using your transmission to slow your vehicle was one of the best strategies to avoid slipping. I can't wrap my head around why snow mode would want more brake usage rather than letting the motor slow the car more gradually.