Let's be honest, there is no real privacy these days....
I have several Alexa devices. My mother (who has dementia) can still remember to ask her a few questions, and play her music. That, in itself, is priceless.
I have the lights, etc., running through Alexa devices. This enables me to work while caring for my mother, and still be sane. I listen to music, news, and bluetooth my other apps (meditation, etc.) via Alexa.
Meanwhile, my mother and her aides can also listen to the daily text, etc., via Alexa.
The value for me far exceeds worrying about someone listening to my trivial conversations.
So, I am a Alexa fan. Makes my life 200% easier.