If Google wants to hear me and my roommate argue about Red Dead Redemption online or the new Bill Burr comedy special, good luck with that.
When I worked in IT, people always used to say oh you can read my emails? Nobody wants to read about your boring-ass life.
My understanding is they are using our speech to create better speech-recognition and it shows. I have much better luck with OK Google than Siri. I willingly give up my privacy for a superior product because most of my conversations are inane.
And if I ever intend to murder anyone, I will turn off Alexa.