They aren't, but there are other pain killers to get through chemo, not just wonderweed.
2. Cocaine still makes a wonderful topical anesthetic for certain surgeries where swelling of the tissue MUST be prevented (some eye surgeries, for instance.)
Again a medical issue.
3. Pray you never need morphine.
Another medical issue.
Since you are acting like Clinton and parsing every word, I will rephrase the question.
Firearms help protect innocent life and property, how many lives has the "recreational" use of a joint, crack pipe, orused heroin needle saved?
Has a joint ever prevented a robbery? Yeah I can just see it.
"Dude put down the gun and have a doob with me."
The pothead will probably be shot and his stash taken.