The 1st amendment protects your right to film in public, so my statement is correct.
The limitations only come from edge cases, like stalking, interfering with active law enforcement, or recording conversations in all-party consent states; none of which would apply to a security camera recording a public view.
A camera pointing at the sidewalk is fairly innocuous.
A camera pointing at the sidewalk that live streams everything it sees to several megacorps and law enforcement agencies is troubling. A million cameras doing this is a surveillance state. That's bad!
Legal? Yes. Dangerous to the populous? Also yes. Something can be legal and also be very very bad. You get that, right? Your argument comes across as "well, I'm within my rights to shout the N-word in a public place!!" Sure, and you're also an asshole. Not for having a camera, but for sending the footage to a bunch of creeps and thinking that's a fine thing to do.
Genuinely asking how is that realistically dangerous to the populace?
Set aside a slippery slope argument, because we’re just talking about security cameras in public areas: do you really think you have a right to privacy on a sidewalk?
If someone recognizes a criminal on a sidewalk from a wanted poster, or a missing child from a milk carton, is that surveillance state? Are they an asshole for calling the tip line, instead of keeping quiet?
Second, laws are made by people. The fact that many of us do not want to be recorded 24/7 is why it is worth discussing.