I still think it insane. We have falling crime rates and we still arm ourselves as fast as we can. Humanity could live without face recognition and we wouldn't even suffer any penalties. Nope, people need to sell their evidently shitty ML work.
(2) Your argument strikes me as somewhat similar to "I feel fine why should I keep taking my medicine?". It's not exactly the same as the medicine is scientifically proven to cure disease while it's impossible to measure the impact of police on crime. But "things are getting better so we should change what we're doing" is not a particularly sound logical argument.
Criminologists aren't certain about surveillance having a positive or negative effects on crime. We have more than 40 studies with mixed results. What is certain with that this kind of surveillance isn't responsible for the falling crime rates described. Most data is from the UK. Currently I don't think countries without surveillance fair worse on crime. Maybe quite to the contrary.
"what we're doing" is not equivalent to increasing video surveillance or generally increasing armament in civil spaces. It may be sound logic if you extend the benefit of the doubt but it may also just be a false statement.
Since surveillance is actually constitutionally forbidden in many countries, on could argue that deployment would "increase crime".
In some other sound logic it might just be a self reinforcing private prison industry with economic interests to keep a steady supply of criminals. Would also be completely sound.
But all these discussions are quite dishonest, don't you think? I just don't want your fucking camera in my face.