I have absolutely nothing to hide. I have simply always treated my privacy as something that was valuable in it of itself. Perhaps even more valuable than the photos I clearly opted to not share with others, to go off your example.
I also don't understand why it's so absurd for some people to conceptualize non-malicious things you wouldn't wasn't to share with anyone but yourself. Hell, I have tons of notes and things I write to myself that I definitely do not want to be seen by anyone. They simply weren't written with the intention to be read by others. So I don't sympathize with desire to make a deceased person's private things accessible, even to family. Let it burn. It might have been the owner's intention all along.