There is no such thing as a Cathay freighter only pilot anymore. The company sold their pax 747’s and the remaining aircraft were only freighters. A majority of those pilots never signed up to fly the freighter only. They were forced onto this type of flying through circumstances and bullcrap policies which has prevented a lot of senior guys from transferring to other fleets while watching juniors take their place.
Now that that has been cleared up your retirement age as a new joiner is the same as every other new joiner but these days most people don’t stick around till retirement.