If you're thinking... I can do all this with a spreadsheet, consider this. A house shopping app. Sure, it can be done with a spreadsheet. But wouldn't it be more intuitive to have an orderable list of houses with an image, a mini Google Map with it's location, and details that are important to your decision making? Making a simple app like that would be trivial with App Factory. It might take you 15 minutes to slap together a blueprint to do that. Then spin up an instance of the app, and you're good to go. All through a web interface.
Buying a mass produced car isn't the same as "rolling your own" from pieces.
And it sort-of has its software equivalent in creating a blog and choosing a theme and a couple of plugins, maybe.
Besides, as far as the "masses" are concerned, software choices are more plentiful and cheap than ever.
So why would the go out of their way, to make apps?