I’d say that consuming content that only confirms your biases is a form of failing media literacy as you’re failing to see the biases inherent to the content you’re consuming. There’s the flaw of “I think it’s this way” seeking out that content and not seeing that it’s poorly sourced (if at all) and eating it up.

Not to mention the role that content suggestion algorithms play in reinforcing that behavior and providing you with even more content along the lines of the biases you’re reinforcing.

It’s a complicated can of worms for sure.