It's all but impossible to buy a high quality dumb TV these days. I bought a 4k TV this past year with the intention of never connecting it to the internet but I guess I didn't do enough research because I can't even access all the functions of the TV without pairing it with an Android "remote" over a wireless network. Even better it's from a manufacturer that sells users' viewing habits.
https://www.engadget.com/2017/02/06/vizio-smart-tv-viewing-h...
Even now they make it opt out. To disable it I had to go into some obscure submenu and disable an option called "smart interactivity," something I never would have found on my own. I had to look up a guide on how to stop my TV from selling data about everything I view on the TV to advertisers!
The way "smart" TVs are going makes me wary of what other "smart" appliances will do in the future.