The problem is that because the government's first aim was containment and spreading the peak and their method of doing this was to try to isolate that group of people most likely to be seriously ill with the virus and need hospitalisation and possibly ventilation, all the emphasis has been on protection strategies for the over 70s and those with pre-existing medical problems.
I think this emphasis has resulted in many younger people, especially those in their late teens and twenties thinking that preventative measures only apply to the sick and old, not to them - and anyway if they get it, it will be no worse than any other winter bug.
I think they simply do not see the long term and wider picture. Which seems very odd, because their enthusiasm for demonstrating for more and faster climate change measures show that they are capable of looking at broader pictures.
I think it is time the much vaunted 'nudge' unit at No 10, pulled its socks up and worked out how to nudge this younger age group into a realisation about just how dangerous this pandemic is.