I have never understood why people don't seem to think twice about allowing everything to be Internet-connected. In the case of a security camera, why should it have any level of Internet access, especially if footage is being stored locally? For any sort of larger corporate or government environment, I would hope that footage is being stored locally! Unless the Chinese manufacturers are doing something diabolically crafty, what is the risk if the cameras are on their own network segment, with no access to the outside? Granted, it might be better if said cameras were not Chinese-made at all, but does that exist, much less at a reasonable price?
We (collectively) sold our souls to the "Made in China" demon long ago, in exchange for allegedly lower prices. Is it really reasonable to start worrying about it now, as if there are really any viable alternatives? Furthermore, it's not like non-Chinese manufacturers haven't had their share of problems, like every car manufacturer (leaking telemetry, broken in-car security, remote features that anyone can play with and track), Internet-connected appliances (why?) with broken security and failed updates "bricking" the machine, critical utilities using non-Chinese equipment with enough holes in their systems to fly an F-35 through, etc. Clean your own house before you accuse someone else of being a slob.