I’m sorry but the OP’s question is silly to me. Why don’t you play chess? Why don’t you play guitar? Both are very good for people that are aging. Both are exercise for the mind.
Also, like strenuous physical exercise, I like exercise that takes you away from your daily tasks, and you get to focus on one thing for a while.
I like to play chess because it gives my mind a rest. Sound strange but is true. Things about work or household stuff disappear. It’s a respite.
The daily stuff just disappears. Work goes away, as do other things. My Wife and I play a lot of chess, and cribbage. We spend time together face to face and put on some music and play chess.
For my Wife and I, your focus is totally on your and your opponents moves. I believe such games helps keep your mind sharper.
Not a lot of day to day conversation goes on deep in a chess game, some of course. But it’s concentration, and strategy/planning. Something other than the strategy/planning about the day to day hassles that come with living.
I suspect lifting is the same.
After 26 years of marriage, my wife and I now know each other better than from 5 years of chess.
Sure we watch Seinfeld reruns or whatever when we are just beat, and really can’t concentrate or are too tired. But give me a mind exercise any day.
I’ve said this a number of times on this board, my Wife was an Iron Man. I was her sherpa. Lots of connection there of course. But Iron Mans are a thing of the past for my Wife.
Yes a healthy body is wonderful. But so is a healthy mind. Physical exercise just makes me think about the things I should be doing instead.
I suspect a dedicated writer would feel the same. It’s all the same. If you can do both more power to you.
Best friend has some sayings. “What every floats your boat” or " Or, whatever, trips your trigger".