Okay bit of nuance; this applies to fiction / nonfiction writing based on writing style, not so much correctness - for judging correctness you don't need to be good at writing code (or legalese, or fiction), but you need to understand what's written on the one hand and what the writing should express on the other.
I don't see how these are comparable. Let me re-word that statement with analogous disciplines: You could argue one doesn't need to be a chef to recognize good food, the same goes for building blueprints.