Yeah, and you know that how? I'd like to see you behind the wheel of a truck when the fog is so thick you can't see the front of your hood, and then the traffic comes to a sudden stop. Or when they detour you because the road you need is closed, and they never calculated how trucks were going to get through these side streets or country roads.
No there are not a lot of truckers in their 70's and 80's. There are few but I'd hardly call them a lot. Like any other job you look forward to retirement and climbing out of that thing to have a real life.