I'm really healthy. I've never broken a bone. Never had major surgery (except for a hernia at 6 months old). And only ever got stitches once... when I had a vasectomy: I got two stitches.
But I am honestly scared of that craving you describe. If I ever get seriously ill, or need major surgery, the opioids worry me. I like drugs. I've done a lot of MDMA and mushrooms in my life, and have enjoyed LSD several times.
But those are recreational and non-addictive. Experiencing that craving for a drug would terrify me, as well. I hope never to experience it. Congratulations to you on recognizing it, and turning away from it so powerfully.