I believe the reason curfews are put in place at night is that during the day although people are allowed out as long as they act responsibly and wear masks, then that is deemed OK...But at night time people want to go out and socialise and that is where in the UK the problems have arisen....Many of the younger generation are partying as they see fit as they don't seem to think it affects them, but they then go home to parents and grandparents and pass it on....No matter what, people rebel against authority and don't like their freedom curtailed, but if a death affects one of their family members it might help concentrate their minds a little.
Having said that, many so called " privileged " people think they are entitled to do and go where they wish.😷