> People tend to behave if they know they are being watched

People tend to behave in the ways that the people who own the surveillance apparatus want them to behave. This assumes that the people who own and operate the apparatus (oftentimes private corporations) can be trusted to monitor and act in the best interests of society. Unfortunately, the people who own and operate these have shown that they are largely untrustworthy and motivated by profit and power.

Regardless, most people would not sacrifice personal agency and democracy for supposed safety. "Behave" just means "obey" or "comply" when used in the context of "people tend to behave if they are being watched"; consent is notably absent.