While I do not disagree, people in the US are used to automatic transmissions that do not have the same behaviour as a manual car (or an EV with strong regen braking). Virtually no engine braking when you let go of the accelerator. And on a manual you can just use the clutch if you lose traction, which you can't do either. It's way more difficult to feather the accelerator to avoid too much regen. And purely using the brakes would result in ABS activation which is better than hard regen without traction control.
So removing the 'low' regen option on the 2021 was a rather stupid thing to do by Tesla IMHO, and that's exactly why a snow mode is needed. Either that, or traction control on regen so the rear wheels will not completely lose traction.