You know what the problem is with the oblivious protagonist? There are so many things that could happen if you think no one is paying attention to how you're living your life.
Like...take Aragorn, for example. He grew up knowing who he was, and what he was supposed to be. So he toed the line--stayed out of trouble, for the most part. I mean, yeah, he fell for the hot elf princess who was a bit out of his league, but he managed to be noble and long suffering about it, and if he ever brought her back home late from a date, well, Elrond never mentioned it.
But imagine he didn't know. He could've done anything with his life. I mean, embarrassing stuff. He could've been a stripper in Bree or something. And then what would Gondor do? They'd still need a king, but would they really want someone who'd been dancing around a pole for a bunch of drunk dudes?
Or Luke Skywalker. Luke's the perfect example of crisis averted. Yeah, before the Empire he was a whiny little bitch, but at least he was a whiny bitch out on Tatooine where no one cared. And before he went and did anything heroic in public, Obiwan and Yoda whipped him into shape. And Yoda straight up said, "Look, kid, your dad's really embarrassing us, so until you take care of him, you can't be a Jedi, okay?"
Personally, if I was supposed to be something high profile and important, I'd want to know about it ahead of time. The last thing I'd want would be to have some all-powerful being show up to guide me to my destiny while I was busy singing "Like A Prayer" in the shower or playing World of Warcraft in my underwear.
Then again, if my all-powerful being needed someone who was honestly noble and long-suffering at all times, regardless of audience, they'd probably be barking up the wrong tree if they came after me anyway.
I'm probably safe.
