It no doubt comes down to motive. Most of us take photos to remember someone or something.
I was up North two days ago and found the church where my parents discovered NTM many decades ago, so I took a picture of it as the sun rose. Nice picture that evokes memories of where it all began. Wonder if I should sent it to Sanford with a bill, asking for a refund?
I have very few pictures of PNG and none of the MKs I grew up with. There was a period I just didn't want to remember so out they went. Of course with the invention of facebook, it's not hard to find people from the past.
Most of my pictures are of our hound or scenery.