My daughter married an Army guy, and got tired of paying over weight for moving all kinds of stuff that lived in the garage in boxes. She got rid of his woodworking mags but got the same thing on Disks, he never even looked for them again. Then when he objected to her getting rid of other stuff they'd moved from one base to another, she said that if he missed it she'd buy another just like it. He could not remember what he had that she'd donated!!!!
I suspect we're a a little like that. It belongs to ME and I'm gong to KEEP IT FOR MYSELF. And then when it's gone we can't remember what the heck it was!!
Call it de-cluttering. Call it Feng Shui. Call it keeping a place neat and open. Call it anything, but it's easier to keep clean when you have fewer things around.