Is it just that there's a direct personal benefit with those devices, and people view the trade-off as being worth it?

I think that's mostly it. Basically since Flocks only use is for the systematic tracking of people for use by police and government agencies, it's a lot easier to get people to turn against it. There's just no upside to them that any individual would ever benefit from.

It's sad because if/when Flock dies the death of deserves, the software/infrastructure will likely just get sold off and reapplied to some other deployment scheme like Ring quietly forgoing the big Superbowl Ad.