Yes, GP's description is incorrect (to be kind, it's just bullshit). If the position is removed (say H-60 maintenance at some base is now contracted out) then the enlisted members doing the work would not switch to contractors over the weekend or even over the span of a few weeks, they'd be moved to another base or another job on the same base.
Now, the people being hired by the contractors are often former enlisted maintainers, but it won't be the ones doing the job previously because of a switchover like this. Those crews will have PCS'd.
That’s pretty rare in the USAF. Most servicemembers will be sent to be retrained on a different airframe or even into a different career field unless their date of separation doesn’t make it worth it. Voluntary separation programs do sometimes pop up but they’re not that common.
It is common to have people separating and coming back immediately as contractors into basically the same job, but that’s usually because there is already a contracted workforce in place and they made connections while serving.
Now, the people being hired by the contractors are often former enlisted maintainers, but it won't be the ones doing the job previously because of a switchover like this. Those crews will have PCS'd.