I would suspect more "we don't want to hire someone who thinks it's appropriate to show up in a literal school uniform to a professional interview" more than ageism, per se.
It's easier to train a professional and prepared candidate in some fraction of job skills than is it to train a very skilled candidate in business proprieties, especially for an interview that starts with a multiple-choice test.
I would suspect more "we don't want to hire someone who thinks it's appropriate to show up in a literal school uniform to a professional interview" more than ageism, per se.