NPR, PBS, PRI, unaffiliated local stations, media not owned by large companies, etc. may not push conservative talking points, but they offer a sometimes differ point of view that is interesting or worth exploring. How terrible is that?
The idea that, on every issue, there are two extremes and the "right" answer is somewhere in the middle is just sort of made up. It makes a lot of sense, though.
If I say China is 1 mile away from the US and you say it's 1 billion miles away, then the answer is probably somewhere in the middle. It makes sense. Except, the middle is not constant. The middle is constantly moving. What was middle 10 years ago is no longer so. What was middle in Confucius' time is no longer so.
If you take a look at history, you'll notice the people in the middle are almost always wrong. The 3/5ths compromise is the perfect example of this middle ground fallacy. Well... that turned out to be wrong, very wrong.
It's possible NPR hasn't changed their positioning at all, but rather, the window has shifted and now what was previously middling is now "extreme". But they could have been right all along. It happens sometimes. There were people around during the 3/5ths compromise who wanted no slavery at all. They were right!