Yes, what a reductive, bogus article! The assumption that 1) people choose majors based solely on ROI and 2) you cannot enter a field outside the domain or discipline you studied in college are both ridiculous and flawed.

Even if one were to take the lucrative salary at an ad-tech or fin-tech company, and then invest that in "effective altruism", you'd likely never offset the net harm, even if you contributed 100% of your salary.