They aren't trying to disprove your argument, simply stating that "increase health concerns" is a poor argument to begin with. You can agreed with a stance and disagree with the arguments.

>Most driving to work is done simultaneously with others aka in much heavier traffic, significantly increasing the risk of commuting vs other driving.

In most major US cities, there honestly isn't much difference anymore. There's always too much traffic, even at the slowest parts of the day.