Is it such a big assumption? One of our 2 physios from last year up and leaves to go to Blackpool as second physio, so the only "career progression" is a different club at similar level. The Doctor who has been there 30 years leaves, I'm guessing not to a "career progression" and our present head of Physiotherapy, so you don't go upwards from that, leaves to take another job, probably at a different club, ie one which will treat him better.
I think the assumption was a reasonable one.