You responded by ignoring them. I assume they bring too much reality to your thinking.
As for your next round of questions.. the answers are No, No, No, and No; though of course it is assumed that misuse of the items is not part of the question.
There is plenty of information and studies to show that guns, surgery, aspirin and dairy foods cause unwanted results including death.
I proudly state once again: that I am inclined to believe that mind-altering drugs can cause problem if for no other reason than misuse
Well of course they can. But that is not the issue.
Can we stick to the issue that there is evidence? (That's rhetorical.)
I did not make the claims that your questions addressed. I do stand by my original reply #3 that there was evidence. My illustration illustrates the tenor of the evidence and provides a URL. The link is below.
These are opinions and interpretations and they have the right and to give their opinions and make the claims