Problem with the Matrix within a Matrix Theory.

Ok we're all familar with the Matrix within a Matrix theory, but ... we're not familar with this:

Why was Smith so readly wanting to get out of The Matrix, I know he tried to kill Neo ( if that was indeed him ... or his persona.. ) but what purpose would he serve in the real world.. he has NO powers now, so he has to deal with the fact he's powerless, and its going to make it a whole bunch harder to kill Neo...

Any one see my point here?

Well, there's so many Agent Smiths now that I think he has one to spare to sit around in the real world and mess around with things

Smith has one purpose, to destroy Neo.

I think Smith realizes that there is no such thing as the
real world and that he only went to a different Matrix. If
you think about it, a machine (SOURCE CODE), can't actually
exist in a human mind, so he MUST still be a machine in a
machines world.

He was the ONLY survivor, which meant he knew all about
the invasion and he knew it's not the first time it happened.

He probably communicated with the machines somehow.

So, why would he go into the "Real world"? Why not? He
can duplicate himself an infinite amount of times, so what's
stopping him from attacking Neo in the place he can't
really defend himself? Now that Neo realizes that he's in
another Matrix he'll not let Smith kill him as easily.