Those who like AppStore actually benefit from it being the only store. It means that almost all developers will bend under Apple rules and users will get their apps.
These users can do the same thing by refusing to use any other store even if they are allowed to, and if there are many of them they'll have leverage. But what they want is to force other users, who would willingly use other stores, to also use only the same one as them. They have no right to force others to do that any more than Apple does.
