When you graduate college you do not want to be full of debt because now you should focus on your career. If you're becoming a teacher, nurse or just opening your own business you should have money left over to give to the career that you are passionate about. The big impact that we will receive without a personal budget is not being ready for a serious emergency.
Although it is important to keep a personal budget for our career or school, that budget can help us be ready in an emergency. For example, if a family member or yourself needs to undergo a surgical process and you do not have the money to pay for it; You would be in great debt. However, if you have a personal budget and this situation were to happen to you then you would surely be ready to have solution ready.