Correct me if I'm wrong, since I only got my information from non-academic sources, but if I recall correctly the problem was that with the inflation, you would have to apply both the theory of general relativity (the science of the really big), and quantum theory (the science of the really small). In which case they totally don't work together and you would get really weird numbers.

Would a more logical explanation not be that our current theories are likely to be flawed, just like Newton's theory about gravity was flawed (but nevertheless incredibly useful) ?