That’s totally irrelevant. The jobs were not there due to a measurement issue. The measurement is in any event very hard to do.
It means there are 800,000 fewer jobs available.
Those 800,000 jobs never existed, so there aren't any fewer. There are just fewer than people thought. The correction to that statistic doesn't affect how easy or hard it is to get a job.
My yardstick is bad doesn't change the reality of thing don't fit.
I don't follow how one follows from the other. If the government suddenly states that the employment numbers went up by 800,000, would that make it easier to find jobs? What if all those 800,000 jobs are all as Walmart greeters? Or neurosurgeons?