The best man will win in the end, but there has to be a process.
The process right now is that Fran named Rikki QB1. He would not have gotten that designation if he hadnt earned it and earned Fran's trust. The process does not include breaching trust with players.
Rikki has been named, and as a result he will start barring injury or something else very unforeseen.
If he performs he stays QB1, if he falters the floodgates are open.
QB1 means he gets the first opportunity, it does not mean he stays QB1 regardless of how he does.
Anybody coming in at this point needs to be told that QB1 is off the board...for the time being.
Look at Shrader, he came as QB2 and then seized his chance.