Yep. The only reason for automated testing is to enable future refactoring, which might be needed for future development. If we only wrote software once, we wouldn't need automated tests. You'd just write the software, test manually as you go, then ship it when you're happy. Ideally not all future development would even need any refactors. A good software architecture would allow one to add features simply by adding more modules of code. But, of course, we don't know what the perfect software architecture is from the start, so we need to assume someone will one day need to refactor.