"Why do we find it acceptable to help people who struggle with alcohol abuse, or nicotine addiction, or opioid addiction, but not to help people who struggle with food abuse?"

I think it is because if 90% of the population did half of what you do (and kudos for you for doing it), they wouldn't have a problem with weight, you just happen to be one of the unlucky few where it doesn't work and these drugs are useful.