I have heard that in many cases, these are actually H1B/Visa positions, where they can set requirements that no one realistically hit, then use that to cover th

I have heard that in many cases, these are actually H1B/Visa positions, where they can set requirements that no one realistically hit, then use that to cover that position with a visa. Reason being, then you can say "no qualified applicants". Is there any truth to this? Or is it just FUD?