If the problem is that it's difficult to learn to fly a fighter jet, and the documentation is not making it simple, the real problem is that the documentation is not fine. Simple as that.
Most pilot text books are absolutely horribly written, finding a good one takes significant effort. Reading just an ok book shines a light on how absolutely trash the majority of pilot text books are and that it is absolutely bad "documentation" that is partially to blame for it being difficult to learn.
Just like inherent complexity in some software or business problems.
Maybe airplanes wasn't the best thing to compare with -- the comment below compares with C instead, maybe that's better. I never flew a plane.