Because unlike the revisionist history majors in this thread, that's not at all the way many (most?) Final Fantasy games are? FFXI is an online game with massive locations; FFXII features expansive locales to explore, a plethora of stats and gambits to manage; a story that's less saccharine nonsense (until the end) coupled to incredible voice acting. Multiple other FF titles feature gorgeous artwork that I adore (namely, FFIV, FFV, FFVI, FFXII, FFXI, FFXIV). Tons of FF games feature sidequests throughout the game, have towns to explore and secrets to uncover around every corner. FF is certainly not Oblivion, but until recently, it has also not been straight lines and handholding for 20 hours. There was always a illusion of traveling around a great world (FFX excluded), always a feeling that you were doing something epic and expansive. There were dungeons which frequently had many side paths and diversions, even optional dungeons everywhere!
I feel like I'm beating a broken drum here, but let's stop pretending that FFXIII is the way FF games have always been and that it's old hat. It's not. FFXIII is so divisive precisely because it isn't the way FF games are, and some people don't like the changes. Some do, of course. But that's part of having opinions, no?