I thought only samples of audio from speech that is addressed to the Home device (starts with "OK Google...") is sent to humans. That by definition makes it not

I thought only samples of audio from speech that is addressed to the Home device (starts with "OK Google...") is sent to humans. That by definition makes it not a conversation in the privacy of your home, it's a conversation with the assistant just like having a phone conversation with someone else in the privacy of your home implies that someone else has access to the conversation.