I've never subscribed to the "Blind Obedience" doctine.
Perhaps it's a matter of perception? In my book when ATC states something along the lines of "if able, vacate at XX - traffic 3 miles behind", it is not a command but a request with the reason appended. If you're unable then so be it. Just remember that major airports have a lot of tin to move around and, guess what, pilots and airlines don't like delays! ATC do their best to keep the traffic moving but do not expect you to blindly comply and compromise safety in the process.