Both an high end tv or a car are expensive items where the manufacturer shouldn’t be making additional income on your personal data.

A free 55 inch tv supported by ads would be subsidized. A big ticket item price likely does not change even if it intrudes on your privacy and the manufacturer makes additional income on your data. In that sense it’s not subsidized it’s just greedy business practices.

I haven't had any insight into the industry lately, but did work for a company in that space several years ago.

Most (all?) ordinary TVs, plus things like Roku streaming devices, are sold essentially at-cost. The profit comes from ads and information-brokering stuff. This makes it basically impossible to break into the market without doing the same thing.