[EtDybNuvCu]

No, the text is awesome. I read it over the weekend.

As an amateur mathematician, don't worry about attempts to apply mathematics to the real world; mathematics is the pattern which emerges from the real world's incidental complexity, and we have always been applying maths to real-world concepts.

Category theory actually provides ways to go from abstract domains to concrete domains. Read the text; it might loosen your view a bit.