Those who have a lot of confidence wonder why all the drama with those who don’t. Those who don’t have a lot of confidence wonder how those who do can be so arrogant.
Contrary to popular opinion, this is not a gender-driven trait, but a personality-driven trait.
The following (overly simplified) chart shows Feelers and Talkers to be “people focused” and Thinkers and Doers to be “task focused.” The people-focused tend to worry more about how others perceive them. The task-focused tend not to think about that too much. That effects confidence.
Half of us are born with it. Half are born without it. Whichever half we are in, it’s our job to learn the best of the other half, not to criticize it.