First, when people climb the rock it damages the environment. Also people even poop on Uluru and Kata Tjuta because there are no toilets there!! That creates pollution. People sometimes drop their phones and their batteries leak out acid which creates pollution.
Lots of activities are restricted because they can damage the rock and other areas of the park. four wheel drives and dirt bikes are not allowed in the park. The park is closed after sunset and re-opened at sunrise, so people cant camp in the park.