Earlier quoted context omitted.
Some smokers are self medicating for mental health issues: https://www.cdc.gov/tobacco/campaign/tips/diseases/depressio... Before you say that is also justification for rejecting them, be aware that some folks on HN are vocal about the need to destigmatize mental health issues generally and plenty of very successful people have mental health issues.
Which, in all fairness, is a big red flag where joint business ventures are concerned... what exactly is your point?
Do you drink coffee? Coca Cola products? Tea?
All of those can also medicate for an unrecognized health issue.
Do you exercise regularly? Eat spicy food? Live a spartan life?
Again, every last one of those can be an effective means to manage health problems.
Not managing them is worse. Being judgy about a particular means of management strikes me as close-minded and ill informed.
There is no clear cut difference between lifestyle choices and health management. Lifestyle and diet play a very large role in health outcomes. And that role is not as simple as "Don't do X and you will be healthier."