You Don't Have To Be The Best Writer In The World To Become A Successful Author. However, You Do Need To Sell Lots of Books.
Science fiction invites the writer to grandly explore alternative worlds and pose questions about meaning and destiny. Inventing plausible new realities is what the genre is all about. One starts from a hypothesis and then builds out the logic, adding detail and incident to give substance to imaginary structures. In that respect, science fiction and theology have much in common.