shouldn't leaders study psychology?
If you want to develop a website, whom would you hire? or if you want to get your car repaired who will you contact? I guess you would say for the first question, the answer would be a web developer, and for the second, the answer would be a car mechanic.
A doctor studies anatomy, because he / her has to work with our body. A software engineer learn software programming. So we all learn the details of the domain with which we are supposed to work.
But ironically, most of the leaders in our organizations are not trained to understand human mind, even though such leaders major time goes in working with other people. Often leaders are those people who have performed their jobs well, and as a reward of their work or because there is no one else they are promoted to leadership roles.
I believe that leaders must study psychology either formally or informally. Psychology helps us understand how people learn, get motivated, or change their behaviour. Psychological thinking also helps us to understand the other person's point of view, which is very important to work with others.