My working class zip code public schooling presented a narrative that academics make low wages. Later I realize the wages of STEM PhDs in industry. I known this does not generalize among discipline but I regret not taking an academic path.
also, he might include that STEM professors earn higher than other academics and have many opportunities to earn high rates of consulting pay, and or spin off to found companies, etc.
There are indeed people with CS PhDs at Google and Microsoft whose primary job involves publishing papers rather than building applications. But that's not the norm.