It's not valuable. One of the things it does is chart "opinion" sources alongside "news" sources, so that the reason you see NPR in the center is that they're talking to a small (and poorly defined) subset of NPR. You see the same thing with NYT "opinion" (allegedly equivalent to Jacobin!) vs. NYT "news" (allegedly equivalently partisan to the Epoch Times!).

I think the real subtext of this chart isn't so much to portray any particular outlet further to the left or right than it is, but rather to boost the credibility of fringe outlets.