I assume people don't buy "dumb" TVs because they basically don't exist any more, outside of industrial/commercial screens that cost way more than an equivalent consumer TV or PC monitors that cap out at about 32". I'm curious which option you went with?
I just use a regular Samsung smart TV, but I use a Chromecast + PS5 instead of the smart features and have never connected it to the internet. If there were viable "dumb" tv options I would totally prefer them though.
I went to a local store (I'm in EU) and asked the salesperson "what's your biggest 4k, dumb TV?" It happened to be a 49" NEO. So that's what I have at the moment. When it's time to change it, I will try the same thing again. If that fails, I'll either get a "hotel TV", a really big PC monitor or a 5k projector.
I just use a regular Samsung smart TV, but I use a Chromecast + PS5 instead of the smart features and have never connected it to the internet. If there were viable "dumb" tv options I would totally prefer them though.