A main reason might be that it’s an admin feature by design. Everything about the set-up of Pages happens in the ACP. Setting up pages, databases, fields, templates – all ACP features. It’s a powerful and therefore complex app that can’t just be easily expose to club owners (i.e. regular members). The Pages app would have to be rewritten to be front-end editable. And if you do that, you open a huge security hole, since Pages allows a lot of raw code everywhere.
There might be a chance for feasible compromises though and I am hoping it will come someday.