Correlation is not causation. Comparing statistics in this way with regard to mortality is faulty without also considering the criteria that may have caused the people to be put on a ventilator in the first place. If they were putting people onto the ventilators who did not meet the normal criteria for doing so and then those people subsequently died at greater rates, you might have something there.
I know of at least one case where someone was put on a ventilator simply because he tested positive for COVID. Now, if that person had died (he didn't), it could perhaps have been rightly claimed that being on a ventilator had murdered him.
But people show up who cannot breathe adequately without a ventilator (as in, they're not getting oxygen into their systems otherwise), I would expect a higher mortality rate for those people. Someone in that state is very sick to begin with.
It is a little difficult to pin full blame on the use of respirators when the use of early treatments could have perhaps kept people from needing them in the first place. The bigger problem was the blocking of the early treatments.
The dragnet that catches those who blocked the early treatments is likely to also catch those who conspired to put people on respirators and remdesivir.