Thats like your opinion man. I personally don't want to pay for gluttony via my tax dollars. I don't care about smokers, junkies, or gambling addicts. If people want to donate to some ozempic fund, by all means.
And, motorcycles require special insurance, as does high-risk recreational sports like climbing. If you drive/commute to work, thats factored into your premiums. If you get hit by a car jaywalking, that is usually on you. Those examples have nothing to do with the prospect of tax-funded anti-fat pills.