Thank you for the apology. You reasoning makes a lot of sense so I wont argue with that. But let me ask you a question. Was the main story in morrowind and Oblivion the best part of the games for you?
Best part? Maybe in Morrowind. Regardless of that, though, the story is the main driving point in the game. It's what causes you to act in the first place. If I just wanted an open-ended world where I could run around, there are plenty of simulators out there. In an RPG, the story is the driving force, just because I didn't rush off to complete the main story first doesn't mean it's not why I played. I went to do other things first to prepare for the main story, to test the game's limitations, to learn about the game, and explore all of the glorious content the developer's created. However, at the end of the day, I did it to train my character, hone my skills, create a backstory for myself, and to prepare for the main questline. In retrospect, in Oblivion it was probably a bad idea to go train up first, but that's another subject entirely.
The point is, without the story, even if it isn't the best part, you just have another simulator. It is the driving force that causes you to act, what moves the game along, and what ultimately ends up being your motivation to play through it. Without a story, the hero is hardly a hero, conflicts are minor and bland, and in the end, you have no real motivation to continue on in the game.
Let me pose a question to you: If Oblivion or Morrowind had no main questline, would they be nearly as fun or interesting for you to play?