Yes, the assigned cause question a problem. And add to that the concept of "excess" deaths being a more telling figure than the causality number. So looking at a model of past deaths you can predict future deaths (roughly) and so assume the excess to that prediction is caused by COVID-19. The problem with that is researchers are saying that up to a third of those deaths could be being caused by health care displacement, not the virus directly. i.e. a trauma patient can't make it into the ICU because it's full of COVID patients.

The statistics are a total mess in my opinion and any being professed with any exactitude should be taken with a grain of salt.