This is actually how a lot of software is written, sadly. I used to call it "trial and error programming". I've observed people writing C++ who do not have a mental model of memory but just try stuff until it compiles. For some classes of software, like games, that is acceptable, but for others it would be horrifying.
Now, it is actually completely possible to write UI code without any unit tests in a completely safe way. You use the functional core, imperative shell approach. When all your domain logic is in a fully tested, functional core, you can just go ahead and write "what works" in a thin UI shell. Good luck getting an LLM to rigidly conform to such an architecture, though.
Now, it is actually completely possible to write UI code without any unit tests in a completely safe way. You use the functional core, imperative shell approach. When all your domain logic is in a fully tested, functional core, you can just go ahead and write "what works" in a thin UI shell. Good luck getting an LLM to rigidly conform to such an architecture, though.