Did you actually read my post? I specifically said that shooter's and equipment's ability was not in question - it's about time. Even fast magnums will take over half second to get there. Want to see what deer can pull off in 0.5 second - check out hunting section and read some bow hunting stories. At least with the bow you got a fair chance of both spooking and tracking the game; at 500 yards you don't do either - if it's not DRT ... then what?
Whats the difference in tracking a deer that didn't fall dead in its tracks at 500yds or 50 yds? Please enlighten me.
As far as flight time, guess you've never bow hunted and seen a deer "jump the string" because they hear the shot before the arrow gets to them. Depending of the speed and quietness of the bow this can occur at distances as close as 20 yards.
So don't pretend that any form of hunting is "unethical" until you've actually spent some time in the field and done it.