It's called the ecological fallacy -- the idea that a phenomenon which is observed (or in the GP's case, totally made up) at the population level can be automat

It's called the ecological fallacy -- the idea that a phenomenon which is observed (or in the GP's case, totally made up) at the population level can be automatically assumed to apply at the individual level. Stereotypes are a common example of this fallacy. https://en.wikipedia.org/wiki/Ecological_fallacy https://en.wikipedia.org/wiki/Ecological_fallacy