Sometimes I think people either don’t read my posts or misinterpret them (or, more likely, don’t care as long as they can continue to reiterate the same points).
In any democracy, the first tool will be messaging and getting buy in.
But there will always be people (as you can clearly see) who are totally selfish and will do what they want, regardless of consequences, because they believe their understanding of a novel zoonotic disease and the computer modelling of epidemiology exceeds the expert panel of PhD mathematicians and scientists assembled by the government. Or, more likely, realise that it is a numbers game and, as long as the majority comply, they can get away with doing what they want.
So the government need to use enforcement for some repeated offenders. For Covid this was some weak fines and, for a few, maybe a night in the cells.
If we had a pandemic virus whose contagiousness and fatality threatened the entire population, the enforcement would be far more severe.
All societies achieved sufficient compliance by a mixture of nudge and enforcement in varying degrees. You will never get to a situation where the ability of the police to subdue all of society is ever in question, as most of society will be on their side.