Is the song 'All Along the watchtower' logically flawed?

A watchtower is primarily a vertical structure providing minimal opportunity for horizontal movement. So how can anything go "all along" one? If Bob Dylan had entitled his song 'Up and Down the Watchtower' there would be fewer issues to deal with. But he didn't. He blatantly ignored the... show more A watchtower is primarily a vertical structure providing minimal opportunity for horizontal movement. So how can anything go "all along" one?

If Bob Dylan had entitled his song 'Up and Down the Watchtower' there would be fewer issues to deal with. But he didn't. He blatantly ignored the overriding vertical component of the edifice in question.

Why?
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