How about you respond to the part where I respond to what's left of your comment?

in a context where the two are only political bias is being discussed

This part is malformed, I’m not even entirely sure what it’s supposed to say. I’ll assume this:

in a context where the two (left and right) are the only political biases being discussed

So you’re saying that the site just doesn’t consider centrist bias at all but only looks at left and right? Why is that? Centrist bias a form of bias too, isn’t it? Why don’t they consider centrist bias?