On the other hand if you notice it many photographers seem to live many years.
Some do, some don't. Here's 35 dead photographers from
a fairly random list with the main commonality being they're famous:
Horizontal is year of death, vertical is age at death.
Insofar as there's a pattern, it suggests that their life expectancy increases. Since the list is biased towards (in fact consists exclusively of) photographers having lived and worked in the West, the increase in life expectancy is in keeping with normal demographic trends.
On average, photographers do seem to live longer than others of the same generation - at least the ones on the list I looked at, and the ones who deceased in recent decades. If you look at the ones who passed away pre-2000, it's much more of a mixed bag. In part this may be due to generally low occupational hazards, as well as many photographers moving in higher educated circles, and education and life expectancy correlate quite strongly to begin with.
Another methodological issue of course pops up, which is that in order to become famous, you generally need a little time. So a list of famous photographers (which would be the ones we'd typically discuss here) would naturally be biased away from people who die young. They would have had less opportunity to make as well as sell/market their work and career in general.
So yeah, photographers seem to live kind of long relatively speaking. Then again, it turns out that in societies with decent healthcare, people with not too insane occupational hazards live quite long anyway - provided they don't smoke, or drink excessively (this is where you might bring up Egglestone, I suppose).
Maybe it's the mental exercise. Maybe it's the sulfite. Maybe it's Maybelline. Or maybe it's just the demographics bracket they slide into and the photography has not much to do with it at all.
Still, I'm going to go with the sulfite. I like that story the best.