You bought the device as delivered. They built it in the best way they know how. If you don't like it you're free to try to change it. But they're under no obligation to make it easy for you.

If the light switch you bought, has a little daylight sensor on it, and turns off when the sun is out, and that's what it does.. you may not like that light switch. You might want one that "does what you want, because you paid for it!" but then you should have purchased a different one, or made a light switch you actually liked. Of course you are free to get the soldering iron out, and try to change the light switch. But the manufacturer is under no obligation to make it easy for you to change the way it works.

That is fair, and right.