I used to be able to bang out reps on the bench w 315 when I was in my thirties. Now, I rarely go over 225 , if I bench at all. For some reason, I feel a strain in the shoulder and know if I try to get back up to 315 for reps, I'll likely rip or tear something. Not worth it just to get a big number up there any more.
See what I'm saying? I'm not going to gain anything trying to max out bench but would likely get a tear or injury and not be able to train. Just not worth it.
I train my fng balls off almost daily, just smarter. No crossfit bs w the kipping and oly lifts w a barbell, etc. No dumbass movements you see all over the place.
You'll get no argument from me. No matter what we do to take good care of our bodies we still get old. If humans were machines we'd age only while we were in operation. In humans activation is at birth and the passage of time is primarily what ages us. We can speed this process because of poor health habits. We cannot stop it no matter what we do.
When it comes to weight training and exercise, you have a very sensible approach, accepting that which you cannot change. You will probably still be training when you are 76 years old, like me. Without a doubt, you'll adapt your routine to accommodate what your body can handle at that point.
Some people ignore their natural aging process and throw the weights around haphazardly as they did as youths. Bill, a fellow I knew from the gym who was younger than me, wrecked his shoulders, tearing ligaments, tendons and his deltoid muscles multiple times because of sloppy lifting habits including continuously shooting for the max weight. His doctor finally told him that if injured either of his shoulders again they couldn't be repaired. No matter what anyone advised him, he'd revert to making the same mistakes.