It's not done for a profit motive in general here, but more that nobody loses their medical license, and no NHS trusts get smeared in the gutter press, for trying to "save" a life against all hope (see the controversy surrounding the Liverpool Care Pathway).
The lack of any legal route to assisted dying is also a problem. Even if that was introduced here, it would probably only cover people with a specific terminal diagnosis, not the more common scenario in the elderly of repeat curable problems.