I also have people in my extended social circle who are in jobs that involve a lot of physical labor. As we all enter our late 30s-early 40s give or take, and they realize what a toll it's taking on their bodies, most of them are trying to get out of it, or have gotten out of it. They realize they aren't going to be physically able to do it another 25 years, and their bodies are going to get increasingly wrecked.

From what I've heard (including from acquaintances who have worked there), a job at an Amazon Warehouse takes a toll on your body for sure. For sure it's hardly alone in being like that.

(The people in my extended social circle who are in jobs involving physical labor are perhaps more likely than most physical laborers to have people in their social circle who sit at desks, and to be able to access networks and resources to shift out of physical labor to make a living).