Earlier quoted context omitted.
Anyone that hasn't done manual labor really has no idea how rough it can be. I worked as an office-furniture-mover in my early 20s (Summers in college), and some days were pretty tough. Granted, that's pretty low on the manual labor skills spectrum, but even for a guy in prime physical shape, it's tiring and has elements of danger. Now that I'm double that age, the manual labor I've done like rewiring my house, insta…
I don’t think anyone idealizes those kind of physical labor jobs. Usually “the trades” is much more skilled manual labor: plumbing, hvac, welding, specialized mechanic work and repair, woodworking/carpentry, etc. No one says people should want a life of a mover, meatpacker, or ditch digger.
It's easy to only look at the top level workers: owners that have young guys to boss around and/or tradesman that have built enough reputation/savings to decline jobs they don't want.
None of this is to say the skilled trades can't be a great career. The work is usually honest, rewarding, and a good mix of mental and physical. Most tradesman are able to work on their own house/car or they have buddies that will help for cheap (and reciprocity). I'm sure many would trade places with the upper tier paid software engineers in a heartbeat, however.