The reason why you can only buy "smart" (read "spy") TVs nowadays is that the TV itself is sold at a break-even price. The profit on them comes from selling products to the users and from spying on them. If they sold non-"smart" TVs, they would have to charge more.

If I wanted a TV set, I would definitely pay extra to get one that could not spy on me. Indeed, I would refuse to have a "smart" TV at all, unless I knew I could block it from communicating anything about my activities. (That would convert it into a mere appliance, and I would not need to care what is inside it.)

The same applies for a cable box; but I can imagine that a cable box requires a contract I would consider immoral and thus refuse to sing.

I don't in fact want those things, because they would lead me to waste time. As a child, I was a TV addict. I cut it off cold-turkey when I went to college.