Unfortunately most just don't care, and a truly dumb tv will have to be so expensive no-one will want to buy it.
People tend to really underestimate the value of their personal information, so they don't really realize how much their modern tech is subsidized by personal information.
The thing I don't get is, smart TVs suck to use regardless of the privacy issues, so why isn't there competition to at least make them good? It's gotten to the point where just turning it on and switching to HDMI 1 is sometimes difficult even for people who understand tech. Samsung TVs are the worst about this despite not being the cheapest tier.
People tend to really underestimate the value of their personal information, so they don't really realize how much their modern tech is subsidized by personal information.