Maybe at college level there is a bit of 'If you aren't vocal about issue x, you're an uncaring person'? I don't see it amongst peers at 40-50yo that you would be considered callous to not obsess over a given issue. (I'm accounting for some level of exaggeration with "obsess" and assume it would mean making public comments, donating, protesting, etc?)

That's kinda the point, they are endless. I have some peers that are continually in a state of distress, concern, and preoccupation. If you are inclined to fixate on these things, you wont ever run out of topics. I have serveral friends in their 30's who will be at a beautiful summer BBQ with friends and be unhappily fixated on negative news of police violence, foreign wars, or other things happening thousands of miles away. Im not saying paying attention to these things is bad, but the inability to stop and smell the proverbial roses is.

In my opinion, the phenomenon is more pronounced with younger generations, and also mellows somewhat with age. I think cranking out a kid or two certainly helps draw ones attention to the "here and now".