If you want to maximize your life expectation, you have to restrict yourself quite a lot.
And I think the goal of studies like this should not be to say "don't use it, it kills you" but rather to make us find a better alternative.
If you live with other people you probably need to convince them to do things differently too.
In my experience this can be very stressful and I wonder if the induced stress of even worse for ones health.
If you want to maximize your life expectation, you have to restrict yourself quite a lot.
And I think the goal of studies like this should not be to say "don't use it, it kills you" but rather to make us find a better alternative.