A person can improve in his profession and there is nothing wrong. Probably not everyone will be able to work their entire life at the same job, but there are those for whom this is normal. This may depend on the country in which the person lives and on the person himself. Maybe he is improving himself at his workplace, or maybe work is not the main source of income for him and he views his work as entertainment and an activity for the soul. Maybe there is simply no opportunity to change your life and get an education. For example, a person simply does not have the necessary qualities.