The point is there are people around who are better at this sort of thing than we are. they have more training, they are fitter, stronger, have the right equipment and want to get on and do their job. They are called the fire service. And during an evacuation they will not get on the aircraft while people are getting off it. They have to be sure that everyone who is going to get off under their own steam has done.
I have to say trying to drag a 13 or 14st dead weight out of an airline seat is not something that most cabin crew are up to, or myself for that matter, and trying to do it while wearing a smoke-hood is not something I would advocate to the crew. Leave the rescuing to the professionals, theres a much better chance the rescue will be successful then.