If somebody is going to be uncritical I don't see how any of this actually helps, but that's totally on them.

I'm not going to argue with them saying that Fox News is right wing or that MSNBC is more left wing. "Duh".

Maybe we're looking at this from a different angle, or maybe we just use the service in different ways.

The "bias" part that is relevant is showing you the difference in headline and contents between dozens or hundreds or thousands based on historical leanings of the news org, and which ones are even reporting on a particular topic.

It's not saying a particular article leans a particular way, it's saying the source does.