Whilst I understood the point of the 24 hour drinking license, I don't think that I was one of the group of society which needed to amend behaviour to reduce alcohol-related issues. If I have any alcohol at all then it's one glass of wine diluted with sparkling water with a meal and that's anything from one day every few months to one day a week.
Whilst there are people who are going to see alcohol as something to overuse or misuse then there's no way that any amount of licensing will change that in just a few years. Changes of national culture take decades, not just a few years.
Any licensing also needs enforcement and that would apply whether pubs shut at 8pm or midnight. Unfortunately there are a hardcore of drinkers who will continue to drink to excess as long as they can afford to do so and that is likely to continue no matter when pubs are allowed to open because so many other outlets also sell alcohol.
'If I had a million dollars I would buy you a green dress (but not a real green dress, that's cruel)'