It seems obvious, but that kind of thing still needs to be verified with science, so we can figure out exactly how strong you need to be before there's diminishing returns and you are getting more trouble with injuries than you save with health benefits.
I've always found the direct benefits aside from the possibile long term health boosts from being stronger to be pretty moderate back when I worked out more, but I also know people who seem to get so much benefit it literally saved their life and they'd probably be suicidal without the gym, it just makes them feel that wonderful, so I'm probably the odd one out there.
It's important to realize the vast majority of people will not get to that certain point. Sure, you may not want to be as large as some of the famous body builders, but don't worry! That takes living your entire life organized around the central goal of getting bigger. If you are going to the gym for an hour 3 days a week you will never get to that point.
I've always found the direct benefits aside from the possibile long term health boosts from being stronger to be pretty moderate back when I worked out more, but I also know people who seem to get so much benefit it literally saved their life and they'd probably be suicidal without the gym, it just makes them feel that wonderful, so I'm probably the odd one out there.