I'll tell you my story, believe it or not.
I had a Samsung phone. got sick and tired of getting not just targeted advertising about shit I had spoken about, buy also targeted emails as well. really freaky shit.
I switched phones. got a fairphone with e/os.
it's been about 2 years now. my old Samsung is a phone I use strictly for work. it only exists inside my office and is never taken outside of the room.
ALL my ads and emails are about work related topics now.
I could talk about stuffing cheetos up my rectum outside my office and never see an ad for chester cheetah. as soon as I say anything about it in the office, boom!
Sure, Google, or Amazon, or Facebook may not be listening to you...but that doesn't mean ~~Samsung~~ someone isn't listening and selling them that information.