Theory: Apple iPhone Conspiracy

I was just thinking about it. I think Apple Didn't want to allow 3rd Party developers to write native apps, IE Non-Safari, for the iPhone because they wanted to steal all of the best ideas and "write" (permanently borrow and not tribute) their own versions. Maybe it's just me, but it seems like they might be doing this so that they don't have to think about what apps people want, they can do market research... just an idea...

I do know that they don't want to compromise the stability of the phone with 3rd party apps, but why not run those in a sandbox?