I think you're missing the point.
Is there a reason these programs need to be on public television?
You said before that PBS was the only venue for educational programs. What if PBS wasn't there? Don't you think these programs, if they are desirable, would show up somewhere else? If there is a demand for this type of programming, it will likely be carried on a commercial station. If not, why should we burden taxpayers for programming in which only a very few people, if any at all, are interested?
The term "bully pulpit" stems from President Theodore Roosevelt's reference to the White House as a "bully pulpit," meaning a terrific platform from which to persuasively advocate an agenda. Roosevelt often used the word "bully" as an adjective meaning superb/wonderful. The Bully Pulpit features news, reasoned discourse, opinion and some humor.