most of my extended family was hardcore blue collar (ranchers, welders, oil hands, etc). When they got older their bodies were pretty broken, most couldn't walk from one end of their house to the other after about age 70. That work is hard on your body year after year and it eventually just wears out. For comparison, my father was the typical white collar worker. He's a minor pickleball celebrity in Florida at 80.
And lots of tradespeople do very well. Many of the bigger houses round here have work vans in the drives. Many of them are landlords too with significant assets. My street is slowly filling up with rentals, mostly by landlord tradespeople.
I was just chatting to a retired one yesterday at the station and he said he was going to have an extremely good retirement until he got divorced and she took half of everything.