Prior to getting clean & sober, my drinking affected so many other areas of my job performance that it didn't need to be addressed. The times i was fired was mostly for the reasons you had stated, lateness, not showing up, poor work ethic, etc... Some employers i have worked for actually encouraged drinking or getting high on the job because they were doing that with us. Fortunatly, someone higher up eventually noticed enough to do something about that to protect the best interests of the company.
After getting clean & sober, it ceased to be a problem for everyone.