I worked as a field construction supervisor (as a junior civil engineer) and remember that the senior supervisor used to told us that we were "his eyes of the job site". Because at the end he was the one who aproved the important things. Of course I also used to take decision in the field and aprove little things. But if placing "video cameras and AI" could replace 70% of my job at that time and pass the rest of the tasks directly to the senior supervisor to aprove it in a faster way, then the junior field supervisor might not be necessary or might have to be retrainned in other areas.