This hardly makes a case at all. Only one section in the middle is actually dedicated to why syntax highlight is bad and it boils down to a baseless assertion about "biasing" the developer's mind toward syntax. I would counter that assisting developers in thinking about how code will be interpreted or compiled rather than bytes of text is closer to the semantic meaning than without.

There's also a comparison to highlight syntax in fiction, which is absurd for many reasons. A simple one being that the _goal_ of fiction can often be to obscure meaning for the sake of ambiguity. I'm offended not by the thesis but by the presumptuous nature of the argument.