I found this quote on another thread that I just found thanks to Communicore's link and I think it captures what some people have been trying to get at in this thread and I wanted to respond:
I think it's there for somewhat strategic reasons.
Families with young children might find themselves in the middle of the World Showcase loop and not be able to appease their picky eaters without rounding the lagoon and heading back to the Electric Umbrella. The chicken fingers at America provide welcome solace from all the scary foreign food like burritos and lo mein.
Ok. It makes sense that you wouldn't go far without offering this standard food for picky children. And I'm ok with that. But this food is available through the kid's menus at almost all of the WS menus. So, why would you need a whole restaurant like this?
The other part of that is, why could they not offer something for the bland eaters and something more interesting that represents American cuisine better at the same time?
Examples of food for this palate elsewhere at QS places:
African Outpost - hot dog
Boulangerie Patisserie les Halls - variety of simple sandwiches
Sommerfest - hot dog
La Cantina de San Angel and La Cava del Tequila - nachos
Tangierine Cafe - chicken nuggets, hamburger
Kringla Bakeri Og Kafe - variety of sandwiches
Promenade Refreshments - hot dog, chili dog
Refreshment Port - chicken nuggets
Yorkshire - fish and chips
And that's not to mention all the offerings that are exactly like Liberty Inn in Future World, right next door.