Even in prod (sometimes) there is no other way to "tell me if it will have the desired effect". Changing something to see what happens, even in production, is n

Even in prod (sometimes) there is no other way to "tell me if it will have the desired effect". Changing something to see what happens, even in production, is not automatically wrong. It's not automatically right either. It's almost like there is no thoughtless simple rule that is always right.