https://en.wikipedia.org/wiki/IBM_and_the_Holocaust
I fully agree with your base perspective, that the main focus should be on preventing authoritarians from coming to power in the first place.
I also agree with your final point, that the government doesn't need tech to lean on a person.
We disagree in the middle, on how tech that makes evil orders of magnitude easier might be a contributing factor and might enable the government to lean on many more people than it would otherwise.
There is obviously a spectrum here, but none of these companies are inherintly evil, the people working at these companies aren't either.
The evil ones are committing the crimes.
We also never seem to accept this answer for other forms of tech. Should we ban encryption because it makes it easier for terrorists to hide? Should your phone run ever photo you take through a CSAM database to catch preditors? Should we ban 3d printers because someone might print gun parts? For some reason we understand that people motivated enough to commit crimes will find a way to do it. This is much truer when it comes to the actions of the state than it is for individuals. I'm never going to learn to smith parts for a gun, but I could figure out 3d printing pretty easily. If the state wants me dead or in jail, I don't think the Flock cameras are that meaningful.
Don't create gradients you don't have dams for.
No, but they were extremely happy to hop over to France and realize that we kept lists that indirectly listed jews. Actions have consequences that we may not be able to predict.