Not at all. I was making the point that there are lots of trucks on most roads all the time, not that they aren't necessary.
Also, while salt makes the road drive-able in the winter, it actually does long term damage to the road (increases the number of freeze/thaw cycles.) Similar with plows: they increase the rate at which the road surface deteriorates. While they both are necessary to keep roads operable for vehicles in the winter, they are the opposite of maintenance longer term as far as the road surface is concerned.
Also, while salt makes the road drive-able in the winter, it actually does long term damage to the road (increases the number of freeze/thaw cycles.) Similar with plows: they increase the rate at which the road surface deteriorates. While they both are necessary to keep roads operable for vehicles in the winter, they are the opposite of maintenance longer term as far as the road surface is concerned.