We couldn't use them, and can't in future, because there are insufficient trained nurses.
Royal Society of Medicine has an an excellent run of seminars on COVID19. One of the topics was how to cope with the NHS backlog and rebuild a health service. The surgeons and others were completely sensible about their 5 year plan which involves delegating a lot of stuff to other people, increasing their skills on that level, while they delegate some of their previous duties to the level below them and so on.
The NHS could upskill a huge number of people and create a workforce that is properly resourced to deal with our new reality.
As ever, there's no lack of work to be done, or increased opportunities for education, there's a lack of vision to pay for the work to be done.