Earlier quoted context omitted.
>I started to notice this when I was hanging out with a very smart friend who worked as a restaurant cook. They just noticed heaps of stuff I didn't if we went out for a meal. Or they were being pretentious to try and impress you. I suspect even they can't tell if melted cheese within a dish started out pre-shredded or not.
You are making up stuff. Skill and pretentiousness are independent variables. Assuming that one is correlated with the other is a sign of poor judgement. I know people that fit would fit in each of the four quadrants {skillful-pretentious, unskilled-pretentious, skillful-humble, unskilled-humble}. Anecdotally cooks are not usually pretentious - perhaps in your circles or in your city things are different? Personally…
Not saying they are, but the types of folks that constantly point out little details that only they themselves can seem to distinguish often are.