The use of Marijuana for pleasure or "recreational" use is a sin. Pain relief is ok as long as you don't enjoy it. I watched my Dad dying from Lung cancer and he didn't want to take the Morphine that could have relieved his pain because he didn't want to get "hooked" on it. People have been brainwashed into believing that dying in agony is preferable to using drugs. Pathetic.
And I'm a 3 times a day sinner. Well, that's not counting...oh, nevermind.
No, your father wasn't "brainwashed". What you observed was a man with character, an individual whose self-esteem would not allow him to become addicted, even in his final moments.
Hell of a man, your dad. And for you to call that behavior "pathetic" ... well, words fail me.