I really hope I’m not missing a silly point. I always buy a TV that has the specs I need and can afford, and have a steadfast rule that they are forbidden from

I really hope I’m not missing a silly point. I always buy a TV that has the specs I need and can afford, and have a steadfast rule that they are forbidden from ever connecting to my WiFi. No firmware updates! - if it does not work when I bought it, it goes back. If it works, I’m fine if it does the same job for its life. What am I missing? Isn't every smart TV in the market a dumb TV if you don’t ever give it the keys to your network?