With the Paris Review printing such things no wonder there is rampant ageism in the tech industry.
You try to uncover X'ism in tech by pointing out ways in which common industry practice Y disadvantage people in group X. But to do this, you had to claim that people in group X would perform worse when practice Y was in effect. Oops! You're an X'ist yourself!
E.g. X = age, Y = working to deadlines/long hours, X = women, Y = speaking up in meetings, etc.