Of course, they don't have to live with all that so they don't actually care. Next time you could ask them whether or not they're willing to renounce their U.S. citizenship and become Chinese citizen again so they can be monitored 24/7 for their own "insider" "good", then you will start to get true answers from them.
Back to the topic though, as a Chinese, I don't actually at the opposite of video surveillance in public, it made many places more safer and thus prosper.
However, surveillance cannot went too far, and certainly cannot be use to shame people. It's about respect of one's dignity, a bottom line that a government should never cross.
Plus, given the poor accuracy that system outputs, what if the system made a wrong detection and displayed information of an innocent? Chinese government probably don't care about it though.