Right, each to his own. And you don't have to be old to not notice important items in a scene. Also I'd venture very few people would be able to recall much of the detail in any scene after even a few years. Perhaps those few with photographic memories could but the vast majority would not.

I take photos often and I've many going back quite a few decades, and many of them I cannot remember taking let alone remember the fine details.

Even when I inspect a photograph to see whether it's worth scanning I'll still miss certain details. I've noticed repeatedly that I only become aware of them when inspecting the scanned photo in Photoshop or such to remove spots, scratches, etc. It's only after close inspection that may take quite some time that I become aware of these features.

For me, photos are an essential reminder of things past. That said, I've noticed some people really aren't that interested in photos, and what's more I've often encountered them. On many an ocassion after I've dug out old photos and slides for scanning I've offered copies to people who were in say original group shots and they've not been very interested. On the other hand, others are very eager for copies and can't wait to receive them.