He looks to have been pretty badly hooked. During the 1970s "Nothing But the Truth" documentary about the Moore-era TTTT, Garry's puffing away during the breaks in taping.
This couldn't have been uncommon in the 1970s. There used to be a
Match Game website with nothing but screen grabs of the celebs caught smoking on camera.
When I interned at CNN in 1983, anchorman Bernard Shaw would smoke when he wasn't on camera. He was very good, however, about making sure the cigarette was stubbed out before he went back on (during
Prime News, he anchored solo from Washington with two anchors from Atlanta). Shaw's death last year at 82 was due to pneumonia, and apparently not related to smoking.
A few years later, I remember seeing an episode of
World News Tonight with a technical malfunction during a taped report; when they returned to Peter Jennings unexpectedly, after a few seconds, smoke was visibly wafting into the shot. Jennings moved to stub out the cigarette, which most viewers probably didn't notice.
The good news is the percentage of smokers has crept steadily downward since it was determined smoking tobacco causes lung cancer; the percentage of adults who smoke today is a bit less than 1/3 of those who did in the mid-1960s.
https://www.lung.org/research/trends-in-lung-disease/tobacco-trends-brief/overall-tobacco-trends