A “Dumb TV” is something I’m exploring developing. There is a gap in the market for a TV with a great panel, no internet connection, and only the processing strictly required for various types of signal processing and format conversion. The closest available solutions are large commercial monitors that cost an arm and a leg.
Did you do any market research? You can very easily go to any store and still buy dumb TVs. I don’t know where people get the idea that 100% of tvs are smart tvs, but that is false.
Walmart represents a store that is easy to go to for much of the US population. That means a good percentage of people in the US are buying TVs at places that don't offer non-smart TVs for sale.