In addition to everythong everyone has said, one major thing that people often don’t think about privacy is how it relates to enshittification.
Modern software services try to optimize everything to make as much money as possible. Everything is a/b tested, and whatever increases some arbitrary metric is what gets released.
They do this by tracking a ton of metrics about how you interact with everything. I know where I work we collect data about every time you click on anything, how long you hover over buttons, etc.
Your phone is not listening to you. https://www.bbc.com/news/technology-49585682
Listening to conversations and turning that into interests that can be advertised against is by far the least efficient method they could use. You can get just as good data through normal tracking.
This is just an example of a frequency illusion where you notice stuff because you’re looking for it. https://en.m.wikipedia.org/wiki/Frequency_illusion