I mean, it's very well possible that the long-term investment in expanding the "base" of willing coders is worth the short-term loss in productivity. But even long-term investments in human capital need better planning than just "hey, I bet a high-schooler could deal with this simple accounting spreadsheet; that would train him even if it takes him a day to fix what I can fix in ten minutes". It's fine investing in high-schoolers, sure, but that's not the point.