Jesus Christ, of course the Mark brands you as special in the beginning. The Mark is the sign of the hero, a traditional element in epic stories. You need something to mark the hero as special, as having some extraordinary power, weapon or other thing that is handed to him by divine forces or some other supernatural entity in order to aid him in his quest.
But the whole become-the-Inquisitor thing is due to YOUR actions, not the goddamn mark. This is a basic concept in video games. It's like some people never played RPG before. Sweet Maker...
Cory: You stole my creation, and used it to undo my work, the gall. (roughly paraphrased from Haven)
This is why Cory is your rival. The whole "become the Inquisitor thing" is because of story. No matter what you do, or how you go about it on the way to Skyhold, you're going to be the Inquisitor. There is no single element in the game that prevents that, there is no alternative branch where you're just another grunt, training with the troops.
Just an interesting aside here, there have been tons of complaints about how Cory didn't attack again after Haven, and it's sad that it took this conversation for me to finally understand why: He can't take the Anchor back, he tried, and you're just not that important, even with it, to him. None of the main story arc villains will come after you, you put yourself in their way.
I do agree, however, it does get to seeming like people have never played RPGs before, I mean, they take a plot associated event, and use it to claim that with or w/out that event, they'd have gotten yet another plot associated event. Someone pointed to the Warden, but in every instance of recruitment, you're shown to be a cut or 10 above the average Joe. The only thing that makes the Inquisitor a special snowflake is the Mark. W/out it, you're not getting anything else. Now, if we had a playable version where you can't close rifts and seal the Breach and still become Inquisitor, there'd be something to discuss. We don't, because w/out that we're not "Just what we needed when we needed it most", we're NPC 45. The next time you start a new game, take a look at the people in Haven after the prologue, all of those people are still alive after the explosion at the Temple. According to the logic, and one flat out statement in this thread, any one of them could have been the Inquisitor.
As another aside here concerning "the things you do and decisions you make": Feeding and clothing the refugees didn't draw Cory's wrath. Recruiting agents didn't draw Cory's wrath. He doesn't attack Haven until you seal the Breach. This is what triggers In Your Heart Shall Burn. Nothing else, to that point, mattered much at all. He doesn't attack after you recruit the mages or the Templars either, other than you have to do that before you can seal the Breach, again, plot. You "undo my work" by sealing the Breach, this is what draws him to you, in order to reclaim the anchor. W/out the anchor, you're no threat to him at all, and even with it, once he determines that he can't take it from you, he never attacks you again. There's never a repeat of In Your Heart Shall Burn, just confrontations with his forces that you instigate.