This is wishful thinking backed up by dropped standards.
Yes, a fighter pilot can quickly enough learn to fly another fighter in terms of basic flying functions, but a fighter is an advanced weapons system built to interact with a constellation of advanced weapons systems.
Not only does a fighter pilot need to learn the particular performance features of the plane, but also the weapons systems, and then combine them in real time to have a reasonable chance of returning the plane whole in a combat environment.
Yes, a fighter pilot can quickly enough learn to fly another fighter in terms of basic flying functions, but a fighter is an advanced weapons system built to interact with a constellation of advanced weapons systems.
Not only does a fighter pilot need to learn the particular performance features of the plane, but also the weapons systems, and then combine them in real time to have a reasonable chance of returning the plane whole in a combat environment.