Yeah they do. Go to your shopping center or airport and you'll see LG and Samsung displays everywhere. And that's the key word, 'displays' not 'TVs'.
Both sell large displays meant for 100% user ownership with no spyware or mandatory internet connection, you just have to buy those and not their TVs.
The catch? They come at steep prices compared to consumer TVs, unless you can land a deal on the used market. But that's the cost of turning a profit on screens with no spyware and ads.
(I don't care about integrated speakers though)
For a long time they haven't been just dumb displays. They also run Tizen or WebOS for digital signage applications.
I don't think that the cost of TVs has gone down when they added spyware and ads.
You could say that that's the cost of turning less profits, rather, and I suspect that TV manufacturers keep the costs of normal displays high just to discourage their purchase by normal people.