We’re talking about big rigs here, there’s already rarely anything a driver can do to “deal with” something like a load coming loose or a flat tire anyways. All you can really do is hope you’ve noticed the problem soon enough to get off the highway, which is obviously something that an AI would be better at with its many sensors and lack of distractability.
Even in situations where the truck ends up stuck in the middle lane of a big freeway, it’s not like the driver can just get out and push it off to the side of the road. Except for a few pretty rare cases, all the driver does is set up some pylons and then sit in the sleeper and wait for the heavy duty tow truck to show up.