Dr Mills, who gave evidence in support of Mr Reilly via speakerphone when an audio-visual link wouldn't work, said the liberalisation of alcohol since the 1980s had given rise to the ''fairly pervasive'' idea that alcohol was just another supermarket product.
While most people used it reasonably, it could cause significant harm to those who abused it, as well as the people around them. Maori, the poor, children and the unborn were disproportionately affected.
The effects included unwanted pregnancies, child neglect and depression. It also played a part in youth suicide and the vicious cycle of unemployment and poor mental health.
Dr Mills said the Far North had a higher concentration of liquor outlets than many other parts of the country and greater deprivation, so measures had to be considered that might not be needed in more privileged communities.
Reducing liquor sale hours was ''no magic bullet'' but was one of the few tools local government had. Making alcohol less available in the mornings would have a positive effect on people addicted to alcohol and on all-night drinking parties.
However, lawyer Andrew Braggins, acting for the Progressive supermarket chain, said it didn't make sense that reducing the period in which alcohol was available would affect all-night parties. Nor was there any evidence that reducing the availability of alcohol in the morning would help alcoholics.
A day earlier lawyer Padraig McNamara, acting for the council, quizzed Mr Reilly on police statistics showing a decrease in alcohol-related crime between 2012 and 2016. He suggested that was due in part to other council initiatives such as education and risk-based licensing.
Police also gave evidence on Wednesday with Sergeant Mike Plant, of Whangarei, who said alcohol was involved in 80-90 per cent of family violence incidents police dealt with.
Mr Reilly has no lawyer but is assisted by ex-council staffer Jane Johnston. While the appeal was in his name he said he was ''the voice of a big community''.
The council, supermarket companies and liquor outlets earlier struck a compromise over trading hours, but the matter still ended up in an appeal because Mr Reilly wouldn't budge.
All parties are due to make their closing statements today. Whatever the outcome of the appeal, all the authority can do is send the provisional Local Alcohol Policy back to the council to be reconsidered.
