Alexa and other home technology - pros and cons

I am of the opinion, maybe somewhat naively, that Amazon, Google, and the like get much easier access to information through our behavior on the internet than through recording and analyzing conversations.
80% of conversations in families are like
Did you do your homework
Put on your hat
Dinner is ready
No, I don’t want that
etc.
All of this in dialect as well
20% might contain information from which some benefit can be drawn, and that information is available directly and unfiltered via the internet, for example, when ordering a travel guide or looking up how much a pool costs.

Amazon knows my clothing size, my music, my movies, my literature, my travel destinations, my birthday, my interests — what new information does it get through Alexa?

It finds out, for example, that you have nicely paid everything on account....

Ok and the tax office is buying the server. CD probably isn't enough
That's right, those are information that Alexa and Co can pull

Google just announced that they have compressed the algorithm for standard queries to under 1GB so that the most important information can be queried locally in the future. They supposedly don’t want all the data traffic anyway.

I am of the opinion, perhaps somewhat naively, that Amazon, Google and Co get information much more easily through our behavior on the internet than through recording and analyzing conversations.

It's not about which method is better - the networking of sources and methods creates the complete picture and thus the value for the "data capitalists." Behavior on the web, who has contact with whom and how often, movement profiles, and on top of that data from home, nutritional and health data... What people unknowingly are willing to disclose is astonishing. That is probably the course of history: Some mistakes of today will seem incredibly stupid to us in 20 years.

Many things cannot be avoided Nevertheless, one must be aware that almost everything is already known anyway, including what I weigh, what I eat (apps), and where furniture is located in my house (vacuum-mopping robot with app control and cloud) I assume that in 20 years many things will be shaken one's head about. I am still partly very analog and even there one has to say, there are hardly any secrets left