Gertrude, you state that you are happy to have others decide on the "red line" for you, which is good. Would you feel the same way if the regulator had set a limit based on a higher altitude, say 1500 feet, rather than 1,000 feet, or a lower one, say 500 feet?
If I thought a regulatory limit was unreasonably restrictive I would have to decide what to do about it. Which might mean shrugging and putting up with it, or it might mean going and reading the RIAs and background research to try to understand how it had been arrived at.
If I thought it unreasonably dangerous, which I probably would with a 500' MSA, then I would impose my own higher limits.