Doctors work single handed
They work as part of a multidisciplinary team and even clinical judgement can be questioned. Even in my part of the world if a doctor had alcohol on their breath and was suspected of being impaired (s)he'd be pulled.
As for aviation, many single pilot ops.
This guy needs support, rehabilitation and insight so that he may again be productive, however most Airlines will make a big show of pushing offender out of the door pronto and trying to turn it into a "we put passenger safety first" advert and "said person is no longer employed by us".