You're correct. The World Health Organization has a definition of palliative care. The Canadian Palliative Care Association has a definition of palliative care. Those two are not quite the same, although they're similar.
The problematic point in the definition is that some people only want to look at end-of-life care. They only want to look at those last two weeks, when really palliative care can begin one or two years earlier. That's one point of contention.
Another point has to do with long-term care. Some people see long-term care as more of a seniors health care issue as opposed to a palliative care issue and would like to separate those two.