pivot to what though, if "mind" jobs are going to be automated, it's not like there's a category of jobs that opens up, and going from mental to physical jobs in your 50s doesn't seem that easy
Physical jobs will drop in demand and increase in supply too. Unemployed "mind" workers don't have much to spend to drive much demand in manual work, and they might even try to pivot themselves to manual work, making things worse for manual workers.
I guess being soldiers in the war against robots and their owners is a kind of physical job
It's a spectrum, with "physical" and "mental" at each end.
Some of Software folk i know move to repairing electronic devices for living. He still works in AC-room, but instead of holding mouse and keyboard most of the time, now he holds meter probe and soldering iron.