This. This is the problem. TVs with user-hostile firmware are the only options available. Imagine if the only beds available were smart beds that wake you up with advertisements and project ads onto your ceiling while you try to sleep. Honestly it seems like we're almost there
If I sell a widget, but do not transfer full control to the buyer, that should be considered a fraudulent sale that was misclassified from a rental.
Same for a computer. Same for a phone. Or a refrigerator. Or a car.
(Old person comment incoming) I remember when working on hardware from the 70's and earlier, the manufacturers would glue in a full schematic on the back plate. Reparability was absolute. Now, its "how can we screw you over with cryptographic signing of individual hardware"
Reparability and ownership go hand in hand. And it also strongly goes towards sustainability and ecology, with not needing as much resources.
But the "Smart TV" in your comment, pcthrowaway, is that in 5 years, the 'Smart' OS will be either so slow to be unusable, die cause a $.10 part failed, or other really dumb ewaste reason.
There are "business TVs", which are pure displays. Sceptre sells a whole line of dumb TVs. They also sell widescreen computer monitors.