The cockpit is left open when all passengers are (supposedly) off the plane so the maintenance crew to work easier. Flight attendants should be fired, and the passenger gets free lifetime rides on another airline paid by Air Canada
i Could be mistaken, but, when I’ve had the great fortune to get the aft-most seat and am the last to deplane, the fought attendants are gone and only the cleaning crew is working on the plane.
Going from ancient memories here, so I could be mistaken. Or perhaps rules have changed to require a flight attendant to be last off.
The higher-value flight attendants need to get to their next aircraft or get to sleep.