Siri, Cortana, Alexa, and Hey Google are all great voice assistants. This is a good thing, and a very useful feature of modern computers, smartphone, and more! However, your voice doesn’t stop with you. It goes from your device to the internet and onto a cloud server somewhere “out there,” only to return back with instructions the device understands and executes.
Oh, and sometimes people listen. Computers can’t figure us humans out entirely.
How to stop Alexa, Siri, and Google: https://slate.com/technology/2019/08/how-to-stop-alexa-google-siri-recording-human-review.html (thanks Alert Internet Surfer Perry!)