The goal of competition is winning, but the purpose of competition is the exhibition of competence. If you exhibit competence, you will feel comfortable as a competitor. If you exhibit enough competence you will win. This takes study, organization, dedication, practice, profiting from mistakes, etc, etc.
One characteristic of competition is that you are focused on a defined set of goals and associate with, and learn from, fellow competitors who share your interest in attaining these goals.
Because you are focused, you develop skills and competences fairly rapidly, and can apply these improved abilities to other areas of modelling.
Jim