"The idea that Cargo crew can not find a job in a Pax company is mostly totally wrong."
I think that rather depends on who you've flown/are flying for.
I did add it was personal experience . . . It was almost completely RIGHT, as many crew had applications in for Pax companies (as you've phrased it) - often to no avail.
I moved from one to go to EAT/DHL who most certainly had their own problems, however compared with what I'd left, they were highly professional and their equipment was well maintained.