In 2007 that argument was true, yes. But when Apple itself releases content creation apps like Pages, Garage Band, and Numbers, and makes ads touting all sorts of other content creation apps its hard to argue iOS devices are not meant for content creation as equally as consuming.
So to answers your question directly, even if you were being rhetorical, no, it's not possible. Apple breached that boundary a long time ago. In fact, before Jobs passed away he was very direct that devices like the iPad would someday replace computers.
True, iOS has those features, but because it CAN do those things, it's not really meant to be a content creation device. Same way it can record HD quality movies, it's not a movie creation device.
Will it become that? Probably. I wouldn't be surprised if they create a PowerPad in the NEAR future with much more powerful processors, better batteries if the need/demand is there. But I think they have struck a very good balance of useability, features, performance. I think that balance is what keeps them ahead of the competition when it comes to real-world use. the people who need a content creation device would probably go with an android or windows tablet anyway.