[Aqwis]

That's a very dishonest summary of the article. What he's actually saying is this:

"Don't do this thing everybody says you should do, except if you're actually interested in the math."

[andrewflnr]

Then he really should have titled it, "You don't need to learn category theory", not the imperative "don't...". As it is, this is a textbook case of linkbait: choosing a dramatic title to get clicks.