[closeparen]

>The questions you research / prep for may be needed at some point in your career.

And most people, most of the time, can and should research them as needed.

>You program for all relevant edge cases, as one might be used at some point.

Yes, because a program doesn't get to pause execution and defer to the human mind to ask "hmm, what do I do in this case?" A programmer does so all day every day.

>are terrible at enumerating edge cases

Any attempt to pre-compute the edge cases of all possible programming situations will be hopelessly inadequate. Enumerating edge cases requires analytical thinking in the moment, essentially the opposite of preparation.