I agree that hospital capacity is an issue.
If the issue is not enough hospital beds, then resources and time need to be put into building more hospitals and expanding capacity at existing ones, so that this can be avoided. Obviously covid is here to stay for awhile, and a lockdown is like a bandaid on a bullet wound. It can only work for a very short time. Why are world leaders not even talking about building more hospitals? It's asinine.
Remember:
exponential growth.
That means it doubles, doubles again and goes on doubling, without ceasing - unless and until some form of herd immunity is approached, either due to natural infection or a vaccine. Many virologists think natural herd immunity may not be possible: it isn't with other coronaviruses, apparently.
Limitless hospital capacity cannot be conjured out of thin air. Especially the doctors and nurses.
Britain built - very fast, due to the help of the British Army - a large number of so-called "Nightingale" hospitals in the Spring, to do precisely that. They are there, ready to swing into action if we can staff them. You may recall the Chinese did something similar. But there is a people-based limit eventually. The UK has done the forecasts, worked out when that point will be reached..... and it will be just before Christmas. Unless we have another lockdown.
That is why we are having another lockdown.
If we had done it when it was first advised, a month ago, we could have achieved in 2 weeks what will now take us 4. That is because it is
exponential. But Johnson didn't listen and now he, and we, are paying the price for his hesitation.