I get that, though I see myself leaning more and more toward physics as time passes. That said, both category and type theory help me a lot every day, even though it's rarely something I use directly.
Anyway, Arnold wrote it, so there's no surprise it's biased. I don't agree with the article, at least not in 100%. I did, however, find it has some good points and IMO it's thought-provoking enough to be shared.