The serious answer to the question.
All pilots are recruited to go fast jet. If they are good enough and training slots are available, that's the way they go.
If pilots are crap, they get chopped and go civilian usually.
Those who don't quite make FJ but are still decent, go to helos or multis, usually based on some of the things mentioned above. With extra experience, some go fast jet later in their career. Most don't!
We all banter the FJ boys, but a ****load of us would have loved to make it