Yes, it is a killer of personal information. For sure. And it's all for nothing. The ads that are broadly targeted, striped from cookies data competly are only marginally less effective than ads narrowly targeted. Last people who even rect to ads are dying out out of old age. Digital-ads natives generations are skipping them without even consciously noticing them. All measurable metricks are falling every year. All those facebook and google empires are build on sand. https://freakonomics.com/podcast/does-advertising-actually-work-part-2-digital-ep-441/

Cambringe Analyitica took unrealibke data, and used it in that weay that wouldn't work even if it was relible. It's a campfire story like those "future mother learned that she is pregnant becouse she started reciving the ads of babystrollers"... It makes the impressions that marketers are gods, with access to amazing forces that can influence anyone to do anything. In fact we are only good at two things: explaing why it's a good thing that all your campaigns have negative ROI, and taking credits for things that happen independently to our actions (like seasonal changes in demand).

CA and FB are just as immoral as you supsect. But they are much less competent.