I totally agree, and if you asked consumers, most would care and prefer for their smart home devices to communicate as little as possible with the outside world. And yet the market keeps offering invasive products, the discrepancy is frustrating.
There should be a system like the nutritional information on food and beverage products, as time went by most people read those and choose accordingly, which then incentivize companies to adapt their offering. We could imagine something similar which would define clearly the capabilities of the hardware or software sold, clearly labelled on the physical package or on the online shop with an easy classification for consumers to understand.