I would agree with that suggestion as I get rammed multiple times per day in a city.
But it would remove the "realism" to drive with the traffic in a city, respect traffic lights, give way to other trucks, and avoid contacts with them to save both trailers from taking damages.
So it's a -1 for me.
If you don't want to get rammed by anyone, you can play on EU#4, it's a NCZ server. (Non-Collision Zone)
It's impossible to have any contact with any player on that server as the whole map is NCZ.