It is SUPER EERIE. But that just speaks to how good their profiles are. If you do some reading on how comprehensive the network effects are you will get what I'm saying, it's worse than listening to you, it's some Black Mirror shit. They know you. It's not worth the bad press or bandwidth to listen, the profiles are way better and your brain does the rest.
See, I have done reading on ad profiles and I still can't believe how it picks some things up. It must be associating strangers at commonly accessed locations, because I swear I've gotten IG ads for stuff a random dude at the bar told me about and I never actually Googled. I have all the location stuff turned on myself (and most do by default I believe) so I can see this being a possibility.
I still don't buy the bandwidth excuse wholly. Couldn't one app, hypothetically, ask for mic permission and listen for key words associated with brands, and pipe that directly into your personal ad profile? It wouldn't need to send any data back out besides 'John likes Purina'. It just doesn't seem outside the realm of possibility for a company like Facebook. They've certainly made choices with little care for bad press before.
I don't entirely know how it works, but it's 100% the scariest future darkage shit I've ever seen.