I'm not sure that I buy that Nolan consciously set out to make a film that's an allegory for the film-making process. Of course, I've never really bought into that whole "allegorical" thing anyways. I've always been in the "sometimes a cigar is just a cigar" camp.
Yeah, no way it's that.
When the interviewer started to suggest that to Dileep Rao he just said "Stop." Like it was so absurd as to not be worth discussion:
And if movies are the director's dream, that means Leo as Nolan is ...
Stop.