You're a doctor and cure a patient; what do you get tomorrow, more patients. You're a automotive worker and assemble 100 cars today; what do you get tomorrow, more cars to build. You're a mechanical engineer and fix a customer's issue with the machinery; what do you get next week, more customer issues.
Jobs where you can regularly fully close a project and never hear about it again are the exception.
You're a doctor and cure a patient; what do you get tomorrow, more patients. You're a automotive worker and assemble 100 cars today; what do you get tomorrow, more cars to build. You're a mechanical engineer and fix a customer's issue with the machinery; what do you get next week, more customer issues.
Jobs where you can regularly fully close a project and never hear about it again are the exception.