It's not just those two choices though. It could be "6 months in relative comfort" and "10 days begging each minute to die but you can't because you're borderline unconscious". Or anything in between. Just saying.
Medical guidelines are there for a reason and are often, as they say in the military, "written in blood".
Having seen a family member die absolutely horrifically in a matter of weeks due to late-diagnosed pancreatic cancer, I'd consider suicide if I got the same diagnosis.
> "10 days begging each minute to die but you can't because you're borderline unconscious"
They aren’t going to know if it does that until they give it to a human in the first place. The only difference in giving it now is they lack a control group.
Having seen the last ten days of pancreatic cancer, there isn’t really a difference with what you’re describing.