No offense to you, but I remember when Amazon was releasing their home devices, and many people rang alarm bells in these forums only to be answered by supposed Amazon employees or friends thereof explaining why these devices couldn't possibly been sending data. Well low and behold, they are sending all sorts of data to Amazon. Were those commenters just lying? Were they misinformed? Were they trying to spread disinformation for whatever reason? Perhaps all three..
Here in America, the gig is up. Everyone, even our grandma's, understands that security and privacy is always going to take a back seat to profit. Always.
So again, no offense to you personally, but everything you are saying must be taken with a ginormous grain of salt.
The only answers are either open source or objective third party auditing, or preferably some combination of both. Words from google employees mean nothing.