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.