9Really? The only reason you missed the shot is because you didn't hit the cue right? There is no other possible explanation?
But, again, the mechanics in D&D DON'T TELL YOU THAT. All they tell you is that you missed the shot. They are completely silent as to why you missed the shot. They don't, at any point, provide a single piece of evidence as to why your shot missed. Not only that, but the die roll that we use to randomize attempts DOES NOT REPRESENT ONLY SKILL. Despite
@Maxperson's claims, that's simply not true. The die roll includes every possible reason why you missed the shot. Maybe there was a loud noise that distracted you and you missed your shot. Maybe the table is not perfectly true (a very real possiblity in any public venue) and you missed because the cushions are dead. Maybe your cue isn't true - again a very real possibility when playing on a bar table or whatnot.
There are many, many reasons you might miss that shot. That's what the die roll represents. What the die roll doesn't tell you though, is WHICH explanation is true. All you are told is that you missed. And any explanation you come up with for why you missed is just pulled out of thin air. It's not connected to anything because you have no information with which to base your narration off of. A simulationist mechanic actually DOES provide that information. Not all of it of course. Just enough to discount some of the very large number of possible explanations.
GURPS, with it's levels of success and failure rules presents this information in a pretty clear way. Old school D&D does it by saying that the mechanics only give one possible reason and thus retries are impossible. There's a million ways a system COULD provide that information. It's just that D&D doesn't do any of them.