Even that isn't true. Plenty of information can be gathered on even the most privacy oriented person due to the actions of others: see Facebook's shadow profiles, or even the use of the DNA your relatives uploaded to learn about your medical history.
If I ever commit a crime, or are framed for one and my DNA is used against me, you better believe my family has sold me out by giving up our shared and essential life force signature.
My point is, there is no big other, no religion, or government who will keep you safe from yourself and your choices. (Or the choices of your family and friends). Any human made laws are show through out history to be maliable, very flexible.
Those that bend the rules take power over those who dont, or don't understand.
A great example of this is tax law ... Huge power disparity between those wealthly enough to find ways to bend the law and those who cannot or do not...
Or safety.
Say the word "drugs" or the word "guns" and watch the people rush to throw the Bill of Rights away.
How are the privacy implications of Alexa microphones any different from those of smartphones (which contain microphones and voice assistant software, just like the Echo does)?
Generally speaking, the way to buy a soul is to offer convinieance. It doesn't even have to be major.
For all those thinking there will be regulation or protections, where are those protections for consumers of the current privacy violating services and products?
You sign on the dotted line and are bound by the terms, there is no big other to protect you from you own choices.
You choose whether you sell yourself, but once you do, don't expect a bigger force to keep you protected...
You are the only person who is going to advocate for you and the people you care about.