If your workplace is optimizing for your enjoyment, there is probably a serious problem afoot. The value of thinking ahead, to be clear, is that it enables you to "actually create" something that isn't ill thought out, or worse, of no actual use to any person. It also allows your work to be understood by other people, who might have to duplicate it, review it, or extend it in the future. It is indeed unfortunate that all of these legitimate demands should intrude on your time that could instead be spent spewing out code.