Because he's a jerkwad that thinks his enjoyment of the game is more important that anyone else's? It's not really any different that the kind of player who will insist on going off-piste simply because he wants to be in charge of the fiction. In both cases the individual isn't (probably isn't) adhering to the social contract of the table. I do think that a GM, in any system, has more choices where "desired experience" is a major component of his heuristic, and GMs generally have more opportunities to upset the apple cart by not conforming to table expectations.I think this conversation has continued without anyone asking and answer the obvious question:
"Under what circumstances and for what reasons would a GM use Force?"
There are corner cases, but broadly, I would say the answer to the question becomes:
"Because simply adhering to the rules and/or authority distribution of the game doesn't provide the desired experience."
But....
What about the case when it does?
Why would a GM use Force then?
it's possible that we also have subtly (or not so) differences in how we're using the term 'GM force'.