I love bacon. I know it's unhealthy. I still eat it.

You seem to be coming from a perspective where the only goal is to maximize life. But that's not how people operate. People are trying to maximize living.

I could probably live to 110 if I ate nothing but tofu and mineral water and lived in a sanitized bubble. But would I even want to?

I don't want to make choices so unhealthy that they significantly impact the quality and length of my life. But I sure as hell want to pack as many experiences as I can before I reach that point. Some of those experiences are going to take their toll on my body. That's the price you pay for living and for many experiences, the price is worth it.

Personally, I don't think it is for cigarettes. (And, in particular, it is certainly not fair to make people in the vicinity of smokers pay that price.) But many people love the sensation of smoking. I do think it's worth the price to have some bacon with breakfast and a whiskey nightcap before bed.

> I feel like if there was data stating every potato chip took X seconds off my lifespan it would be easier to deny myself from buying them by looking through the items at the supermarket and being able to think "17 minutes, 22 minutes."

You are describing a dystopian nightmare. Can you imagine this applied to every choice you make? You see a cute person on the other end of the bar and a little chat bubble appears in your personal heads-up-display "They will break up with you two years after you begin dating." You look at a cute puppy at a shelter. "She will die young of congenital heart disease."