Sony and nVidia are not ad companies.

In fact that are. They are selling TVs cheaply subsidized by ads.

When I first purchased my TV there were no ads on it. The ads came later when Google updated their Android launcher. So, where's my discount?

Why do you think Google - an ad company - was trying to get into the TV market?

I don't have time nor the information to second-guess possible future motivations of every company in a supply chain before buying a product. Most people won't even realise Google provide the software for a lot of these products.

Yes because it takes great insight to know that a Google based product probably exists to gather information about you for targeting advertising. It’s not like Google is some obscure company.

The first time I saw a TV advertised with Google as the OS I laughed out loud thinking "who in their right mind would buy that?!", but then again, quite a lot of people buy a phone with it so I guess there's enough people out there who simply don't understand why it's problematic.

>who simply don't understand

Most likely they do and their pros/cons calculation is just different from yours.