The suggestion isn’t so much to start fixing ventilators or patient monitoring systems at community repair events, but rather to allow hospitals’ in-house electro-biomedical engineering teams (or 3rd-party specialists) access to the documentation, diagnostics and parts required to carry out repairs themselves.
This sounds pretty similar to the approach adopted by NHS England during the height of the pandemic in the UK. In March/April, they put out a call via RAENG for volunteer engineers to help maintain equipment under the supervision of in-house specialists: