When the patients put on ventilators would have died anyway, claiming ventilators killed anyone is pretty ridiculous. When hospitals used ventilators it really was a last ditch measure. Before doing that, at least three less invasive oxygen enrichment measures would have been tried (I was on the second level before I started recovering, so I’m not making stuff up). A ventilator being the last ditch measure, many, unfortunately, would die. And being a common last-ditch measure, many who die in the hospital will have been on a ventilator. Correlation is not causation. In the same way, almost all who die of pneumonia were on antibiotics, but the antibiotics did not, therefore, kill them.
When absurdities such as the ventilators-kill claim and the remdesivir-kills claims lead to refusing or delaying potentially life-saving treatments, the absurdities could kill.