gasbag 1:
One never knows what is going on in his personal life. Some people make bad decisions and certainly this would seem to be one of them. Fortunately AA and many others have excellent pilot support programs for substance abuse or stress problems . You will get more than one strike in normal circumstances from the programs but not many more.
I have known a number of pilots with "drinking" problems. Some just plain drunks other driven to drink with personal issues. The majority go thru a program and come out the other side clean. But I know of a few that did not and were terminated or forced to retire usually after a second or third occurrence.
Those options and programs are moot for those pilots who report for flight duty intoxicated.