Or perhaps it is about there being extenuating circumstances for the extreme downturn in US participation rate - fair enough, you'd be right. But you can't deny that at least recently, jobs that disappear form the system have not come back - perhaps we have entered an era of 'ratcheting down' of jobs.
That was my point, that the jobs disappearing and not coming back is a recent phenomenon, while technological progress is not. This suggests that something other than the increase in technological development is causing this drop.
Your comments about women in the workforce in eg USSR in the early 20th century are a red herring.
It was a response to the claim that the only reason we had a growth in labor since the 50s was due to women entering the workforce. In America, maybe, but they were already working in other countries.