You can buy any menu item ala carte- so yes, a simple meal, minus those desserts and sodas averages around 8.00-even less if I happen to grab a kids meal instead....I don't consider using an extra side of fries as 'food' instead of an actual lunch (to split 2 qs creidts among 4 people) Personally I wouldn't split food to the point that the bulk of the meal is those 2 extra sides,and I don't consider those prepackaged (2) dessert choices at many qs or a bathtub sized soda as having any actual value either.
*My point- the 'average' qs meal, a cheeseburger,fries,and a bathtub soda. Take that Cheeseburger and fries,and convert the dessert and soda into two extra sides of fries,or a cup of mac and cheese,still doesn't equal enough actual 'food' for our family. We split items, but the bulk of our meals must include actual food.
You see that '17.00' quickly becomes a game at trying to make those (possible) 4 qs meals into 8(based on a fam of 4 in a room,trying to stretch those credits into lunch and dinner) and you see why the hassle of trying to do this is.... a hassle,and not one that Disney is hoping the average visitor would even think of!
The average visitor will buy 4 average meals using those credits, probably toss away 1/2 the unwanted foods(it's a lot of soda per person for one meal) and that is their bottom line.*