The fact that tax money is spent on various social protection things, like health care, allows to legally limit one's apparently personal choices, like smoking,

The fact that tax money is spent on various social protection things, like health care, allows to legally limit one's apparently personal choices, like smoking, that increase the tax money spending due to those choices. Such is the nature of most, if not any, tax-funded welfare features. Which is one of the reasons so many people oppose government administered healthcare(At least in the US). Once the government is financially responsible for your healthcare, it has a legitimate stake in regulating the lifestyle decisions that you make. For example, if the overwhelming evidence shows that consuming pork results in increased healthcare costs over time, the government has a compelling interest to prohibit the consumption of pork or since we know unequivocally that use of tobacco results in increased costs for healthcare, (as you mentioned)the government has already taken steps to limit its use but has not yet gone to far as to prohibit it (in large part) because the tax revenues collected on its sale are not inconsequential.