I know it's not that hard for folks who are technically minded, but minecraft isn't only played by tech friendly people. The 'saves' folder is not always easy to find.
Consider how easy it is to upload a single player world to a Minecraft Realm. You don't need to worry about getting it from your 'saves' folder, and configuring a server config file - it just works. Same for downloading a Realm to your computer.
Installing and sharing custom maps should be as easy as that.
