Yes, nothing about causation, but it does say this.
"HCQ use was associated with an 11% increase in the mortality rate in a meta-analysis of randomized trials." That makes your earlier reasoning incorrect.
"For example, people with cancer who undergo radiation generally die at a much higher rate than cancer patients that don't need radiation. Because they're sicker to start with... Radiation probably saved a lot of people, in the big scheme of things. But any study would show that it's associated with a higher mortality rate."