Are you really responsible for your car accident record, or did you through no fault of your own develop an adrenaline addiction, propped up by auto commercials

Are you really responsible for your car accident record, or did you through no fault of your own develop an adrenaline addiction, propped up by auto commercials and a neighborhood that normalized street racing? For any tax or public policy you can find sob stories on the edges, it doesn't mean it's not a good idea in the aggregate to enact the policy. Which is what I'm pointing out in this case, it's generally a good idea to tax the specific harm that's being addressed (unhealthyness), not some mostly-but-not-quite related variable (sugar consumption). That organ transplant example isn't meant to be plausible, but an apocryphal story. You presented a story of "no treatment for you" for someone being grossly negligent with their own body. I'm pointing out that you'll equivalently have otherwise healthy people who don't get timely treatment because the health care system overall is strained by obesity-related illnesses, tobacco-related cancers etc. Doing nothing is equivalent to continuing to punish people for their health problems because some other people have preventable self-induced health problems. So I don't think you can make the slippery-slope argument, or claim the moral high ground.