These TVs can capture and identify 7,200 images per hour, or approximately two every second. The data is then used for content recommendations and ad targeting, which is a huge business; advertisers spent an estimated $18.6 billion on smart TV ads in 2022, according to market research firm eMarketer.
If you have a nice enough router you could connect your TV to it and block its Mac address maybe.
Or maybe configure the firewall to block/allow only very specific things. It’s a bit more technical than just plugging in an Ethernet cable though…