Ah, The 80s, What a Time
This story, probably fairly obviously, is a less recent one and stems from the 80s before smoking stopped becoming as common and laws were put in place that made it illegal to smoke in a lot of public places like restaurants and airplanes.
Still, even by then, it was known how bad the effects were of smoking, and the smell alone was disgusting. It’s not a solution to a problem, and insulting a patient like that as their doctor is a great way to ensure they never return again. Time to look for a new PCP.