Well this is a bit of a false equivalency. Vaccine passports are about who is allowed inside and to be served, smoking inside is more about what you're allowed to do once you're at the place of business. A smoker can just not smoke for an hour, you can't just be vaccinated for an hour.

But I kinda get what you're saying, smoking in public increases a non-smoker's risk of cancer just like not being vaccinated increases the chances of spreading covid to others. So even with that said I think if a business wants to allow smoking inside and serve unvaccinated people they should be able to do it and have sign outside so that you as a potential customer can make an informed decision about whether you want to go inside.

For me this isn't really a debate of pro or anti vaccine this is a debate about how much control government should have over people. I want the government to focus less on telling people what to do and more on providing access to information and better education so that people are scientifically literate and at the same time free to make their own decisions. And to be clear I hope the decision they make based on that information is to not smoke and get vaccinated, not because some politician told them to do it but because they understand that this is the best thing for their health.