A long time ago, someone told me that "stick time counts". And that adage has proven to mostly be true - in my experience at least. There are elements of (student) talent (most certainly) and the quality of instruction does help (which is why some B2s are kept away from those who are struggling) when it comes to encouraging good results. Good instructors and bad instructors are always part of the mix, and many of us have managed to get to where we are because of and in-spite of those instructors...
The creamie/FAIP concept facilitates giving young-blood some valuable stick time, usually on those less complex / more basic sortie profiles, whilst ensuring that the number of take-offs equals the number of successful landings - at a reduced cost to the tax payer. It's the bottom line - so to speak.
I had the pleasure of watching my course-mates go off to war in the former Yugoslavia... That feeling of being parrot-sick has never quite been forgotten!