That's right, Hexi. Such all-inclusive generalizations are just one of dozens of tried-and-true techniques in the old art of cold reading--the chicanery which for centuries has been employed by tarot readers, palm readers, crystal ball gazers, and all manner of self-described psychic.
As to why so many people buy this kind of nonsense, I think P.T. Barnum had it right when he said, "No one ever went broke underestimating the intelligence of the public."
Index
There are gaps in my memory. I've done things I have no recollection of. Like when I crashed and fractured my skull... I don't even remember the moments leading up to that event.