To correct any potential flaws in our training, it's necessary to first forget everything we thought we knew, and prove everything from first principles.
In the entire history of aviation, nobody has ever sat down and worked out what a pilot needs to know! Regardless of whether it is right or wrong.
Take a look at the current theoretical exams for a commercial pilot, mostly junk. I recall one school recently complaing that a PPL student, who was exempt the Theoretical Knowledge because he had passed the ATPL exams, didn't have enough knowledge to pass the school's aural test!