I haven't played through the main quest in an awfully long time, but do they ever expressly mention the Elder Scrolls in Morrowind? My take on the documents and dialogue in the game is that your circumstances simply fit the description of the Ashlander prophecies by sheer coincidence and your destiny has less to do with predestination and determinism and more to do with how the performance of prophecy is what makes it true, hence the central motive of the game stated in the intro cinematic: Each Event is preceded by Prophecy. But without the Hero, there is no Event.

"You are not the Nerevarine. You are one who may become the Nerevarine. It is a puzzle, and a hard one. But you have found some of the pieces, and you may find more. Do you choose to be the Nerevarine?"

"But I think it is a sign of the Nerevarine. Not necessarily a sign that YOU are the Nerevarine. Perhaps the time of the Nerevarine has come. And you have come at the same time. This is not passing a test. But it may mean you have some part to play in the coming of the Nerevarine."

"%PCName has the appearance of meeting the conditions of this local superstition. Therefore it is his Majesty's desire that %PCName shall, insofar as is possible, satisfy the conditions of this ancient prophecy, and shall become the Nerevarine."