Someone actively pointing a camera at you is perceived as an aggressive, hostile thing. People get immediately defensive.
A static CCTV camera wasn't installed to video you in particular, so therefore people are more accepting.
Regardless, I'm always thought that sousveillance was a terrible idea. All it does is to normalize the idea of ubiquitous surveillance without providing much, if any, actual benefit in terms of coping with ubiquitous surveillance.
All I can do, personally, is to support organizations that fight this stuff, and to refuse to participate to the greatest degree I can. By this I mean avoiding going to areas where surveillance is used to the greatest degree possible, expressing my concerns about surveillance, and teasing/shaming friends and family who buy into the whole thing by using things like Ring doorbells, etc.
None of which will change anything overall, really, but you do what you can.
Many of them will freak out when they see another person point a camera at them, but they don't seem to care that dozens if not hundreds of surveillance cameras film them every day when they walk around a city.
Out of sight, out of mind.