Having worked in ad tech, I want to address the "my phone is listening to me" concerns.
It's a cost benefit analysis. Why dump computing power into analyzing voice data when they already have your location, your relationship status, your height and weight, your sexual preferences, everything you've looked at online in the last ten years,
your foot, shirt, and house size, your educational history, your race, your tentative plans to buy a hat, the names of all your friends, the make and model of your car, your medical history, etc. etc. etc. etc. etc. etc. etc.
Microsoft alone tracks 2000 data points for every person who's ever run into one of their cookies, and unless you live in the woods running Tor on a homespun Gentoo server, you've run into one of their cookies.
I couldn't come up with 2000 things about myself, and I've been writing about myself for twenty years.
Running up ads based on audible conversation doesn't make sense even if it was effective. People lie by accident in conversation, and most of them are careful about what they say aloud because they're fully aware that they can be heard by people in front of them.
They're a bit more carefree when browsing the internet at home alone.
Smart phone eavesdropping is a bogeyman that shouldn't concern anyone because it's already way, way worse than that. If the government went officially authoritarian 10 years ago and seized Google's servers, everybody would have been completely boned.