I think that the FDX Professional Instructors get first looks at the resumes because they are considered "internal" hires. I don't have a problem with them practicing for the sim check because the sim thing is only vertical S's used to show a minor level of airmanship.
Furthermore, they are already know the ways of Big Purple and would, IMHO, be on top of the game a lot sooner than a street new hire.
Professional slots are frequently open, so others can apply and enjoy the same "advantage" after the 2 year freeze for applications to the line.