I'd say it shows that for most day-to-day work in the software industry, a certain percentage of the CS material we learn is simply unnecessary. No one has ever

I'd say it shows that for most day-to-day work in the software industry, a certain percentage of the CS material we learn is simply unnecessary. No one has ever asked me to re-implement well-known algorithms that are found in well-established libraries. There are, of course, people who do this, and they do need such a background. But they are likely outliers.