UCLogic - your brand of logic doesn't seem to register that your aeroplane doesn't go anywhere until the crew are on board (and ready to go fly). Bear in mind, there is just a legal allowance of 1 hour for all of crew briefing, various bussing around, security, aircraft preparation and boarding - So you want crew to stand in a queue for the best part of that? - I do hope you dont have any pressing engagements at your destination, because you will be very late!
and if you think crew compliance with the rules will always lead to a swift passage through security, you really haven't been paying attention.