If people didn't want them they wouldn't be on. It's called capitalism. You give a product or service and the people either choose to use it or not.
I don't like them all but I enjoy the entertainment factor of some of these shows. I grew up when all you could watch was an occasional fishing show. Takes these shows for what they are....entertainment. Its when folks start measuring themselves against the TV hunters that problems start. Mostly envy and jealousy.