People also have to remember that the aim is not to totally stop the spread of Covid-19, because that's pretty much impossible, merely to restrict it to levels that the NHS can cope with.
Of course, ideally, cases would be as few as possible, but it also has to be remembered that the knock on effects of lockdown are not consequence free, including deaths due to other causes.
Suicides due to poorer mental health due to change in routine, financial pressures etc will increase.
Domestic murders will increase
Accidents in the home will increase
Deaths due to inadequately exercised dogs could increase
Plus there's the huge knock on financial and economic consequences that will blight us all for decades. The longer this goes on for and the tighter the restrictions, the worse these will be.
It's not quality of rule adherence that will stop Covid-19, it's effective social distancing. If you live in a remote area, you can be out all day and not come close to another person.
If you live in a populated area, you could be out just once a week and be in closer contact with more people so, while you are being 'better' at keeping to the 'as infrequently as possible' guideline, you're at more risk of spreading the virus.