Why is that? Is it because of low pay?
Some roles pay very well, but are inflexible and boring. I knew a guy making $180k as a contractor to be a storage engineer. His entire job was fulfilling SAN zoning requests. He ended up bootstrapping a startup just to stay sane.
Not sure of salary, but his schtick was 12 month leases of black Cadillacs, so it was pretty good. :)