What about people with dyslexia (such as myself)?
What about people who have test-anxiety?
They aren't arguing that hiring smart people is a bad idea, they're saying being dismissive and discriminatory is a bad idea (and illegal, in the US - violation of the ADA).
Out of curiosity, this is a serious question: are you a programmer and if so does dyslexia cause you problems coding? lots of library functions can have confusingly similar names and spellings for me, and I don't have any reading problems.