This guy will have had his career ruined finished Caput. There was an equal incident at Leeds UK where the pilot turned up unsteady on his feet and was found to be way over the limit.
All alcohol related incidents are not Alcoholic s but maybe a pilot with a personal problem or doing something he regrets the night before as a one off.
The very thought that they had to blow into a machine going airside would have saved both pilots their careers so its not just for passengers being flown by someone unfit its also about getting pilots to think twice and call in Sick