And doctors such as Robert knew that, used for medicinal purposes, alcohol was a useful addition to their medical bags. Brandy, for example, was used as a cardiac stimulant to help those in shock, such as accident victims, of whom there were many as a result of mining or farming accidents. Further, many doctors felt that the prohibition of alcohol for medical use was another infringement of the government on doctors' right to treat their patients as they felt best.
The government tried to get around this by allowing doctors to prescribe alcohol, which of course, led to other problems.
Robert was himself a teetotaller for a number of personal reasons and his wife Jennie was firmly opposed to drinking, but he always carried a small flask of brandy in his medical bag and used pure alcohol as a disinfectant for his surgical instruments when he could not sterilize them in any other way.
To learn more about alcohol and prohibition go to:
http://www.herbmuseum.ca/content/medicinal-alcohol-canada-during-prohibition