anyone can post anything they like, but a park bench is something built to function. and you can do many things with said park bench. you can have a model pose on it, you can sit on it yourself, you could take photos of an elderly lady feeding pidgeons, you could take a parkour shot, or if you like the bench then you could snap a plain photo. the bench is built to function, but someone's sculpture usually is not, this is a plain photo of someone's work. not all photos belong on facebook, but plain shots of other's work do.