Photography... it helps a bit when I have 2 cameras around my neck, both with long lenses. My right arm always gets sore from holding one of the cameras for hours, but can't imagine how it would feel if I didn't workout.
A long time ago, the reason I first started weight lifting was because I really wanted to be better at rock climbing. In the end, logistically speaking, rock climbing was too complicated (too far to drive and no one to go with) so I gave it up. I stuck with the gym tho, even if there have been highs and lows in my commitment level.
Yeah see that's the thing. You don't necessarily realise the affect of weight-lifting in your dday-to-day errands and/or hobbies. I know I didn't, until I had to move and lift heavy furniture and luggage. I was at the point of failure and just couldn't be bothered to use my arms any more (they were pretty sore at this point), so I went down in a dead lift position (without realising it) just took this heavy-ass piece of luggage (maybe 35 kg), set off with my legs and thighs and out of nowhere just threw it over my head! I never knew the sensation of a standing planck up until that moment! I seriously think I might have done major damage to my body had I not had the core muscle/strength to pull that lift off, because I was already pretty tired from 2 hours of lifting and transporting furniture.
So yeah I definitely think those cameras would be causing you hurt/pain if you didn't have the stamina/strength to do for hours on end. Bodybuilding is truly a life-style.