Well.. if he's drinking he's not in recovery or recovering or anything having to do with recovery. At all.
If he's in recovery and actively participating in..well.. recovering, he knows he drinks because 1. he's an alcoholic, 2. because he's using alcohol as a crutch to medicate something else, 3. and/or because he's plain ol addicted to alcohol, and is doing everything he can to address his life and get things in order so as to prevent living as an active drunk.
A lot of people have ****** days on the job, traumatic childhoods, a rainy cloudy day and DONT drink or use drugs. Alcoholics and addicts do.. and it's up to them to figure it out on their own, and embrace recovery because their lives and spirits depend on it.
I say this mostly from my own experience in recovery.