I think your expectation is unrealistic. The days when the Beeb was educational are largely gone. I wonder (don't know) even if it is stated anywhere in their goals or objectives to educate (though it should). Nowadays it's just another group of ratings-chasing channels, and little more beyond that. So, not too much to ask; but probably too much to expect.

Before the Beeb, others have even higher responsibility to educate; and I fear they don't.