The majority of the population are vaccinated, the majority of cases of COVID are slight or not serious, there is a panolpy of drugs to treat it if does become serious, 2 more drugs were approved for use last weekend.
The COVID Fact Check No 19, published by the BMJ gives a detailed breakdown of recent hospital statistics, show clearly that while the unvaccinated are a diminshing proportion of the population, they are a significant proportion of COVID admissions to hospitals. It is worth following the link to read the actual document. It is revealing and reassuring.
www.bmj.com/content/376/bmj.o5
When COVID first occurred and before vaccinations were introduced, all of us were in danger and those with underlying vulnerabilities at a higher danger, but just as the vaccination has made life much safer for the healthy vaccinated, it has also reduced the risk to those with vulnerabilities, because of their vaccinations, other people's vaccinations. they are also at less risk if they get the disease because of the treatments now available.
Of course COVID will continue to be a risk to them, but so is flu and all those other winter bugs that go the rounds, so most of them must have already been taking precautions of various kinds before COVID struck, so if they act now as they did then , they should be as safe as they ever were.
Nothing is, or ever was, 100% safe. There is always the risk of catching an ordinary infectious/contagious disease and dying of it, even though you are otherwise well. We just have to weigh the risks against the problems.
You could retreat to one of those isolation pods that people without immune systems are placed in and stay there for ever, even then that cannot guarantee 100% protection, or you could coolly measure the risk.
If you go outside and mix with other people, the vast majority will have had 2 or 3 jab, and, if you are one of the few who do catch COVID,to quote the above source booster doses are 88% effective at preventing hospital admission.
Obviously everything would have to be reviewed if a more virulent version of COVID appeared or a drug resistnt version of omicron. But as things are at the moment what si the point in staying in on a sunny day because it might rain later.