I have enjoyed decades of golf so far with firm glutes and firm abs as an unitended benefit :)
I'm always tickled when I read these stories. I'm chasing an albatross personally to complete my scorecard (got a hole-in-one the 1st decade of playing).
https://www.thevillagesdailysun.com/news/in_todays_daily_sun...
https://www.tri247.com/triathlon-news/age-group/ironman-kona...
The key is to start early and build up enough strength and fitness to sustain you for awhile after the inevitable, irreversible decline sets in around age 70.
I know golf has a seniors tour, but always laughed at the thought of the NFL doing that (oh the humanity!) :p
I feel like that analogy is lacking. Nevertheless, it's unlike any other sport I've played, like ice hockey, for example, which is more like driving in NYC.
So far my only BJJ-caused back or shoulder injuries were from early on when I was either too inflexible (and so it was easy to push it too far), or too stupid to tap (hadn't realized what "too far" was). Take it slow, find good training partners, listen to your body, and take up complementary activities (some strength training, flexibility things like yoga, core training especially for the back).
I also do judo once a week, and that’s lots of fun but a bit scary compared to bjj. I probably won’t continue doing that when I get old, not sparring at least.