Much of the harm to lungs from smoke is from the particulates. That won't be quite the same issue for things you eat. And then a bunch of the compounds present

Much of the harm to lungs from smoke is from the particulates. That won't be quite the same issue for things you eat. And then a bunch of the compounds present in the smoke, that would get absorbed in the lungs, are not going to concentrate in the meat (anything with a low vapor pressure will mostly be driven off and exhausted out of the grill/smoker/etc).