> These small, lightweight, weak EVs are a bad joke in that context, they'd be useless.

[citation needed]

Power is not the limiting factor in icy road conditions, traction is. While a heavier car is easier to get moving due to increased normal force, it's equally harder to stop. The actual difference makers are snow tires so you have more traction, and electronic stability control/antilock brakes so you never lose traction.