If I was a pilot I'd hate to be constantly surveilled by a camera, even if the footage is "never reviewed". In fact, it's got nothing to do with being a pilot.
If I was a private pilot, sure (and I am one). If I am a commercial pilot ferrying hundreds of passengers or millions of dollars worth of cargo, I'm no different from a public transit employee (or a public employee for that matter), in which case I damn well have to put up with being surveilled on camera.
I didn’t look too closely, since I just wanted to make sure it was off, but iirc they said they only upload the footage around the time of a crash to see how effective the safety systems were, and to get a sense of what to improve”. Basically one of those “please waive your privacy in the name of science” types of deals. Didn’t dig through any privacy policies, though, I’m sure Googling will yield a better answer.