But there are certain substances in drugs and tobacco that induce addiction. It's a bit different from some random loser who has no life and is addicted to an online forum or whatever; the online forum doesn't per se invite you to become addicted. I get your point but I think addictive substances are slightly different than computer games/sex/MTF/etc.
"But certain interests of particular people are so important that it would be wrong - morally wrong - for the community to sacrifice those interests just to secure an overall benefit. Political rights mark off and protect these particularly important interests. A political right, we may say, is a trump over the kind of trade-off argument that normally justifies political action." - Ronald Dworkin (RIP)