Your mockery, at least as concerns standardized testing in general, is misplaced

A good item was not one that discriminated between ignorance and knowledge, but one that discriminated between good students and poor students. Therefore, if everybody selected the same distractor, good and poor students alike, the item was discarded, even if it was important stuff to know, even if it was right. And no matter how important, if the good students didn't get the right answer, the item was thrown out.

That is in reference to a firm that produces standardized tests deciding to abandon a particular question because inner city kids did better on it than suburban kids did.