One time I went to a dinner party where I didn't know anyone. The hostess was serving pasta and a salad. I watched as she took a can of whole olives and cut them into slices.
Doing so was very labor intensive.
Why would someone slice whole olives? They are sold whole, sliced, chopped, pretty much any way you could want them. Now me, I love me some olives, but for those who don't, leaving them whole would probably make it easier for them to pick out.
If she had been my friend, I totally would've questioned her olive cutting logic.