There are a lot of reasons for automated driving and most of them have something to do with human behaviour. Sorry for trying to put the statement about tailgating into perspective.
One thing that you should remember if you are the type of car driver that does this is that truckers are communicating with each other and not all of them are safety minded, or driving a company truck with a phone number on the back. What this means for you is that you may succeed in your little power trip against the truck behind and then have an unpleasant experience with one of the trucks up ahead. It's not right but it does happen. Some of these drivers are sociopaths who would be delighted to run you off the road.
For clarity, I'm not talking about quick little misunderstandings or short periods of distraction while a car driver makes a mobile phone call or sends a text. I'm talking about the parent comment with a truck attempting to pass a slow car and that car speeding up to prevent the pass, and then repeating that process several times. This happens often and it's maddening. You have to just let it go but you do wonder about the car driver, and why they choose to have a pissed off trucker following them. Automation can help with this for sure, and the car driver can go find another person to annoy.