It's the wide variety of people who inhabit these boards. There are large portions of this country where you can no longer find much other than chain restaurants. For example, if the only pizza you've ever eaten is Pizza Hut or Papa John's you probably have no idea what a good pizza actually tastes like. If your reference point for a restaurant steak is Applebee's you may not be that choosy. I'm going to guess there's no pit out back of the Sci-Fi where the ribs have been smoked all day but I wonder how many of their patrons get real BBQ at home or know what it's supposed to taste like?
I am amazed at the number of people who seem to go to the Sci-Fi for burgers. I feel like when I'm at WDW, every other day I'm having a burger at a CS place when we're trying to have a quick lunch. I think a burger would be the last thing I'd order at a TS place and if the burger is the highlight of the menu then I'd rather eat somewhere else, or once again grab a CS burger and save some time.