Is unit testing in all circumtances only example?

Unit testing is not universally applicable in all circumstances. While it is a valuable practice for ensuring code quality and functionality, its effectiveness can vary based on the complexity of the system, the development methodology, and the specific context of the project. In some cases, particularly with rapid prototyping or very simple scripts, the overhead of writing unit tests may not justify the benefits. Ultimately, the decision to use unit testing should be based on the specific needs and goals of the project.