I interacted with at least 7 psychotherapists (one of them is a relative) and a whole bunch of other specialists in the field. It took three decades and a push from my side for someone to even figure out that something about me was kind of strange.

Yes, experts can recognize patterns. But that has limits & biases, and tends to be unreliable for outliers. And when that person doesn't even check their results all bets are off.