Not many prints are hollow as it would leave them quite fragile and susceptible to damage.
When you put an STL through your slicer you can select the infill % that will determine how much goes into it. We recommend for most prints having between 10-15% infill. I personally print with a 10% infill on the vast majority of my prints.
You would be surprised at the gaps that printers can bridge without stringing. I’ve found though that the extra time and filament is worth it compared to having prints that might break apart or fail due to being hollow or having too low of an infill.
You could always try to print a piece hollow and see how it turns out, I’d love to hear how it goes