What would be better for the educational system is to stop using TVs for anything ever. Frankly TVs are the tool of lazy teachers who don’t feel like going through the trouble of preparing a proper lecture. Of all the TV time I got stuck with in school maybe 10% of it was actually useful, the rest was a cheap excuse for the teacher to spend a week sitting down not talking.
TV's are a poor medium for this anyway. I prefer to integrate the digital video into a multimedia presentation that is then displayed via data projector onto a large screen. As for whether the educational system would be better if the use of multimedia were removed and the students had to sit in the class for hours listening to the teacher lecture and take notes, you will probably find a lot of technological Luddites who hold that view, but it is rather ironic and amusing to see it being expressed on an internet forum where people copy articles for discussion and often post images and hyperlinks to add either information or humor to the discussion.
If I had more time, I'd find a link to the scene from Ferris Beuller's Day Off where Ben Stein is lecturing his class on the Smoot-Hawley Tariff Act and the Great Depression as an illustration of the type of classroom environment you seem to be advocating.
I disagree.
There are plenty of times that a TV show is a valid teaching tool.