Covid deaths proliferate. Why?

Why is is that despite the roll-out of vaccines to millions of people and tough lockdown measures the number of people dying each day from the virus is just going up and up? In the UK the latest death toll over the last 24 hours was 1,564 and in the United States it was 4,300. In each case that is the largest daily death toll since the pandemic began in March last year. Why is this? There are numerous new and successful drugs given to the worst-affected patients in hospitals, so the death rate should be coming down. But it's doing the opposite. Can it seriously be because the populations of the UK and the US have just given up and have become so complacent or so devil-may-care that they are ignoring all the advice and meeting up with all their friends and families, never mind the Covid watch marshals in yellow jackets who are waiting to pounce on rulebreakers. Most people I come across on a daily basis appear to be doing the right thing. They wear masks in shops and supermarkets and buses, and I haven't heard any raves going on next door. But when you do spot someone infringing the rules it does make you wonder how big a problem this is. I saw a perfectly nicely dressed man in his 40s walking into the local butcher shop a few days ago without a mask. You could see the butcher with hand signals miming the putting on of a mask but the customer ignored him and carried on ordering his meat for another five minutes, then walked out past the queue of people outside not looking remotely embarrassed or sorry. Do you confront him and risk a slap in the face or keep quiet? You only have to read the newspapers to know that too often people who dare to speak out get a punch or kick or slap or verbal abuse. So you keep quiet. Did this man have Covid-19, unknowingly, and did he therefore leave a virus trail in the butcher's shop for other customers to pick up? Multiply this a million times and you begin to understand why it is that the virus is still spreading uncontrollably and why so many are dying each day. It is the ultimate act of selfishness. Not caring to obey the rules and causing deaths as a result.