> But for some reason Sony or Samsung doing the same on your TV is too far?

The content streamers get your viewing habits by virtue of you viewing their content (like Youtube, or any web site, getting information on what you're looking at by simply logging HTTP GET requests).

There is no reason why television OEMs need to do screen captures and send them to the mothership.

It's the first- and second-party interaction: you gave money to Sony/Samsung/etc for a product, and after the exchange there is no reason for any further interaction.

You have a regular/monthly interaction with content providers: there is at least a valid reason for the content providers to have that information in the first place, and none for the TV OEMs to collect it.