Until you spend thirty five minutes explaining to the receptionist for the intermittent carrier why rerouting through Chicago makes no sense when carrying freight from NYC to Hoboken NJ.
You act like there wouldn't be multiple plans submitted with obsessive communities arguing about best practices and min/maxing efficiencies before accepting routes.
I see you have never dealt with trucking companies before. I had a truck puck up in St Louis in June one year and break down in FL for three weeks delaying the arrival in NY for several months. There's no need for the truck to be in FL because that's not a direct route and we had filled the truck but that's how dispatch directed it.
That's mostly because the people running them are interested in making money and maybe aren't doing it with the same passion. Besides, I'd say logistics, being something that critical to modern society, would be one of the things included in that 20 hour workweek I mentioned. People would still have jobs, but they'd be left with so much more free time than they do now, time that wouldn't need to be spent on side hustles and the likes because society would be geared towards covering needs, not making money.