People who can read minds are generally better at reading minds and understanding psychology, and generally give psychological hints to subjects.
Mind-reading is very common, just like shooting, swimming and driving. It is just a skill from learning and practice.
More strictly speaking, mind-reading is not "you know what others are thinking", but "you know what others may be thinking."
So there is nothing mysterious about "mind reading", it is just "you can make better judgments".