I don’t know of a single study which went out into the real world of “normal” people and tried to ascertain how many of them have ADHD but succeeded anyway…
You're saying the early studies of homosexuals were self selected rather than randomly selected, and those with ADHD that have been studied haven't been randomly selected because the focus has been on those with problems. So what criterian can we use to randomly select for study? Has an instrument been designed to randomly select from a large population of consenting adults? Even consent is self selection.
You probably would want to evaluate middle aged people to see how they coped and how successful they had been in relationships and earning a living. There is probably also a spectrum or degree of variation from "farmer" personalities.
You're saying the early studies of homosexuals were self selected rather than randomly selected, and those with ADHD that have been studied haven't been randomly selected because the focus has been on those with problems. So what criterian can we use to randomly select for study? Has an instrument been designed to randomly select from a large population of consenting adults? Even consent is self selection.
You probably would want to evaluate middle aged people to see how they coped and how successful they had been in relationships and earning a living. There is probably also a spectrum or degree of variation from "farmer" personalities.