1) Americans place freedom of speech (including photography or recording things) very highly and are willing to suffer some damage in exchange for more freedom.
2) Limits on recording in public would very quickly and very easily be weaponized by police against minorities, leftists, and basically anyone else who resists the creeping tide of ---- well, you know, right wing politics.
Saving celebrity's from paparazzi sounds nice and good, but we're more worried about what happens when the police show up. Can we record them attacking us, or will that now be considered an additional crime that the policeman will get to punish us for? It's very easy to see our rigged Supreme Court ruling that police officers have "an expectation of privacy on the job" in light of your points.