Very good general point. But I would add the caveat that generating code in a data driven way from a standardized format is fine. You change the data and re-generate the code, fix the calling code if need be.

Also I think it depends a bit on the language and what exactly you generate. If you generate concrete types (or classes) then that might lead to more fixing and refactoring down the line. If you generate data it's different, because you are going to have a general interpreter for said data that doesn't care about its concrete shape.