>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.
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 I've got little time for pretentious people.
> I suspect even they can't tell if melted cheese within a dish started out pre-shredded or not.
You can deny the reality of other people all you like. A more open-minded scientific approach is to listen to other people's experiences. People have some weird skills. And they believe some weird things. But yeah, it is hard to truly judge the skills of others.
Just because you're ignorant of something, it doesn't mean that something isn't real, or that others can't perceive it.
And just because someone knowledgeable shows you something you hadn't noticed before (and then you start noticing it all the time), it doesn't mean it's just all in your head. Being discerning about things can be taught. (And sometimes knowing can be a curse!)
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.