ExploderWizard
Hero
I was tootling around this evening and was cleaning up my shelves. Took a moment to read some old Dragon issues on a whim. Surprisingly enough, happened across an article, or series of articles actually, that specifically talk about this. In Dragon 283 (so this is 3e, WOTC Dragon just to be clear), Gary is continuing a series on "What the Heck is an RPG?!" in his Up on a Soapbox column. From my understanding, he had polled a number of gamers, over 200 is mentioned in the article I have, and outlined 16 elements of a roleplaying game. He then ranked the elements based on the poll.
This is from the final four, and, appropriately enough, contains the element of Story.
So, even back then, and this is May, 2001, so not so long after the release of 3e, people identified the ability to have direct impact upon the story to be of paramount importance. Gygax even identifies Exploder Wizard's position almost word for word and says that while some people do promote this concept, the majority take it much further.
Thanks for finding this, good research

If you will make note of the part that you bolded for emphasis you will notice Gary's explanation never mentions anything that needs to occur from the player outside of the adopted role. For instance:
most participants want a more direct involvemnt of the players' characters in the shaping of events.
The players' characters. Shaping events. How do the players' characters shape events? They shape events through thier actions within the game and within the limitations the role of thier characters permit.
They desire that their characters not merely perform but also interact meaningfully with the environment as their players direct so as to actually shape the story as well as have the capacity to affect its conclusion.
Characters interacting meaningfully with the environment. What does this mean? It means that when players have thier characters take actions and make decisions, those actions and decisions should matter in the game's milieu and should not be rendered meaningless by plot device constructs fabricated by the DM.
Nowhere do I see anything indicating that all of the above cannot be achieved without player only metagame resources utilized from outside the adopted role.