I honestly don't understand how people can simplify this problem and say things like "we just need to get on with it now."
We need to stop the virus from spreading so quickly that hospitals become overwhelmed. If hospitals become overwhelmed with COVID, they won't be able to do anything else. Hospitals are still catching up from the first wave. Yes, we need to "learn to live with COVID," but part of that needs to be by controlling the spread. Otherwise, too many people will get COVID at once and no one will be able to access basic medical care (even for non-COVID related issues). Additionally, many people who would have survived COVID with medical treatment will die because the NHS will not be able to treat them effectively -- potentially increasing the case fatality rate by a lot.
If case numbers are low enough, an effective track and trace system could potentially allow us to return to some semblance of normal.
Unfortunately, our T&T has failed us and has not been effective or efficient enough. Our numbers are now too high to control through T&T, especially with such a poor T&T system and we have essentially lost control. The only way now to get the numbers right down is to prevent transmission through lockdown measures. Lockdown measures are not a management plan, they are an emergency measure that need to be put in place when control measures have failed.
Sadly, the opportunity afforded by the first lockdown to re-open carefully whilst controlling the spread seems to be passing us. We opened too quickly, with not enough in place to control the spread. We will now likely need to put in place some significant measures to get the numbers down again.
If you are annoyed with the government, be annoyed at how they wasted the opportunity to reopen carefully. They put lots of money into Eat Out to Help Out and paid people to crowd into restaurants, instead of encouraging people to support hospitality by ordering takeaways. They put virtually no thought, funding, or resource into how schools could be opened safely. What we are seeing now was the inevitable outcome of these decisions -- it could have been done differently.
Hopefully the government will have learnt something from this experience and once the numbers are right down again, a more thoughtful reopening plan paired with more effective T&T might make the next reopening more successful.