> the notion that it lacks nuance to describe the intricacies of text rendering

I took this to mean that any non-domain-specific language may be bad at describing that domain, e.g. why physicists, mathematicians, chemists, etc. have a common symbology for the discipline, or why programming languages exist. i.e., not so much that English is uniquely bad among written human language for conveying these topics, but just that any non-specialized language may be.

Though, I think the author did a fair job, but I lack the domain experience to guess at where the misconceptions might lie.

I had much the same conclusions. The author did a perfectly good job of explaining the issues.