If you show me a person that is immune to cigarette smoke and scientifically prove how this immunity works on a biomolecular level, I will withdraw my statement.
As much as I would love to produce a circumstantial proof of evolution of our lungs, I do not do research in that field. But there is plenty of research on virus immunity and cancer that supports what I said.
People simply are not that different. One big difference between groups of people is lactose intolerance. Some people have it, others don’t. Therefore, drinking milk is neither considered a healthy nor an unhealthy lifestyle, it highly depends on the individual.
Well, where I live, milk is very heavily marketed as something that YOU MUST DO OR YOU WILL DIE. That may be different in other countries.
Smoking does not. It affects everyone, some more than others, sure, but noone is immune.
Agreed.