No. As psi29a said, go read the lost chapter. Idea is also manipulating events in many other ways, all the way to the genetic level. Apostles are just one of the ways that it manipulates events, albeit the most obvious. As to your arguments about people not knowing Idea exists, and there still being reasons without Idea, these are completely besides the point. Sure, there were reasons for bad things, by they were often reasons such as "Shit happens, you got unlucky. Too bad." but people want more then that. They want there to be a deeper reason, some higher plan that caused this suffering. The fact that no one knows about Idea is completely irelevent. It's job is simply to be the reason for all of the suffering and bad things that people endure, and it fulfills this purpose. It gives meaning to all the otherwise pointless suffering that people endure in their lives. Of course, it isn't a nice reason, but then, that's not what people wished for.
I'll quote, then, if you're so keen on this:
Humans
Desired reasons
Reasons for pain
Reasons for sadness
Reasons for life
Reasons for death
Reason why their lives were filled with suffering
Reasons why their deaths were absurd
They wanted reasons for the destiny that kept transcending their knowledge
Then you make no sense. Before, my reason for pain was that I stubbed my toe. Now, the reason for pain is that I stubbed my toe, except this time, God willed it so..... except I don't know this, and all I know is that I stubbed my toe.
Meaning nothing changed, since humans keep perceiving it the same way. You say people wanted more than this, but since they keep seeing the same "shit happens", what's the difference? It means that, aside from apostle-creating, Idea doesn't do crap, except add a supernatural allure to already existing reasons.
Where does it say Idea is the reason? As far as I can read, unless there's a translating error, Idea provides these, it itself isn't one.