Then I would suggest making more Australia A game, but that doesn't happen. So there is no other option that to give players an international cap and see if they can hack it. The answer would be more games, rather than less games then.
The two FC matches recently were both initiated by the BCCI, not CA. And outside of the two Aus A tours of NZ in the past two years, I don't remember all that much Australia A cricket.
These are the players that the selectors have deemed to have earned their spots in the Australia and therefore the ones that Australia are going with.
There once was many more Australia A games. They didn't get much coverage though.
Agree that's what the selectors have chosen and hence if that's the case then they get no excuses for their performances.