Yeah that 400hr vs 1000+ hr pilot is a pretty idiotic argument. Now I agree that a pilot that shouldn't be a pilot at 1000+ is no better than he is at 400 hours. It's just common sense. Most pilots use their experience to make themselves better pilots. Hence why you are usually a better pilot after a 600 hr difference. If you are pilot good enough to hang in the 121 world and do so with skill, then you will be even BETTER after 600 hrs. Simple concept. Anyone that thinks otherwise is just trying to be challenging.