So, as I think most of us can reasonably agree, there's computer science, and then there's software engineering/software development. Two separate endeavors with a few shared skills.

I'm continuously frustrated by the number of people on the "software engineering" side of the fence who confuse the two, and who demand computer science skills in applicants to develop web apps.

By the same token, it appears here that we have someone on the other side of the fence (computer science in the academy) making the same error. He refers repeatedly to "programming" and its application as a job skill. He then rightly states that few programmers need calculus for their job. But from there he extrapolates that computer scientists don't need calculus for their job, which is not only a huge logical jump, but also makes this age-old error of confusing computer science and "programming" as a job skill.