The hospitals have been hiring nonstop. Unfortunately medical staff is also leaving the hospitals that treat corona patients. As one said, speaking to a journalist, the current patients are a "potpourri of difficult personalities", so the nurses apply for jobs at things like eye clinic and the hospitals can't even operate the beds they have.
You can't simply increase hospital staff - these are highly trained people. That's an investment that takes years to pay off. Encouraging social distancing doesn't work, people are tired of it and many either didn't care in the first place or don't care now that they are fully vaccinated.
Many western countries messed up big time by not investing enough into their health care systems or into properly educating their population. So now they're out of options.
Increasing staff won't add more beds to already full hospitals, though. And social distancing has been encouraged for a while, even for the vaccinated, and it hasn't seemed to help.