Oh man, this was the same problem I ran into with my product years ago. Everyone wanted to shoehorn it into a website creator. Showcase (as was my product) is a form of "digital document." Think about sales sheets, proposals, document delivery, etc, etc. Not necessarily things for public consumption, but things that you want to present in an ordered, eye-catching way.
I don't see that feature, but they're more likely to be able to than squarespace/wix.