When there is no mentioning of something (other sources of light of fine-tuning of the initial model) it doesn't mean there weren't any. Just like there is no mentioning in the Bible that the newly created earth circuted the sun or that the day-and-night cycle was 24 hours, but it doesn't mean it was otherwise.
As for calling something good and then modding it:Look at Playstation or iphone or even the game that brought you here (MTW).
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