The data showing tendencies (smoking vs life-span) is definitely out there, but those are statistics.
Here is a guy who smokes daily who just turned 114 years old at the end of May 2019!
https://www.newsweek.com/worlds-oldest-man-guinness-world-record-smoking-tobacco-fredie-blom-947687
But the reason that your requirement is unwise is because it will be a long time before we
begin to have the kind of data you are looking for. There are a couple of key reasons for this!
1) The most problematic aspect is that there is only one Earth.
2) We could not begin to collect this data until people die from smoking.
3) Greenhouse Gasses are not steady, they are increasing every year, so how can we measure the effect when the cause is in constant flux?
To get the data you cited from studying smokers, researchers have involved
thousands of people who smoke at various levels, and the studies tracked their outcomes. In other words, these were studies that took decades because essentially they are determining influence of smoking on death so have to wait for death (of at least a large percentage of their test subjects) before their data can be compiled into anything meaningful. We can't wait until the Earth is in dire shape before we respond (unless you know a way to reverse trends with any measure of quickness).
The information you are asking for can only be guessed at because we will not have a single verifiable data point until the Earth/Civilization reaches some milestone that we probably don't want to get to.
My grandfather died from lung cancer at 62 years old in 1965. At the time, there was no data like what you are talking about. He was a chain smoker and doctors generally believed that smoking was the cause of his cancer, but there was no hard proof and definitely no numbers as to how much smoking resulted in how much loss of life-span.
I'm not sure when we finally established hard proof, but I do pity the people who continued to believe smoking would not harm them. I think this is a fair parallel to people who don't want to react until there is proof with precise numbers! It is not parallel however, in the sense that for smoking people were making their own choice for their own life. Here everyone is subject to the results.
So, the problem is you are placing a burden of proof (and somehow see it as something that you are entitled to demand) on scientists that would make it impossible to do anything before it is "game over"!