The difference between hard and soft speculative fiction (science vs fantasy is really more about the setting than the universe structure) is how big the plot h

The difference between hard and soft speculative fiction (science vs fantasy is really more about the setting than the universe structure) is how big the plot holes are in the fabric of the universe. Why does only one special person have the magical powers? Why do people use their incredible powers only for rather mundane tasks? How is it possible to create that space fortress that has more steel than the all conjectured quantities within 100 light years? The more questions you can ask and file to get good answers for, the softer the fiction is.