The main reason why people can't or don't want to admit that they made a mistake or don't like to be corrected is because they lack humility. Being humble and willing to learn or improve will allow an individual to see that they made a mistake and find out how not to make the mistake in the future. People who don't accept that they made a mistake are living in their own world thinking they are right about everything when they are really not. They are living in ignorance with no ability to make improvements. They could have also learned this behaviour from friends and parents. But their bevaviour is mostly because of their own attitude and not being humble enough to say " oh i'm sorry" or "wow i didn't know that. thanks." Its just a part of some people's personality to be that way. People who are wise know that we learn by making mistakes. We learn to walk by falling many times. So there is nothing wrong with making a mistake. A mistake just lets you know what doesn't work or how not to do something to get the result you want. Then you can change your actions to get the desired results.