The U-3 rate does not include those that drove for Uber one hour in the month. The gold standard metric is labor participation rate of white men over 20, and that's not looking good: https://fred.stlouisfed.org/series/LNS11300028
For what? "labor participation rate" or "labor participation rate of white men over 20"? The former is regularly cited, but the latter seems like a contrived statistic to make a point.
It’s not a contrived statistic. It’s a way to look at the fundamentals of the economy in a way that’s not confounded by the distinct effects of immigration, etc.