Yep. This is a cynical counsel of despair. "Don't try filtering truth from lies. Everyone does it. Just lie back and think of England."
There is a difference between withholding information, selective emphasis, and outright lies. They are all bad, but they are equally bad. If you want to make things better you attempt to differentiate better from worse actors.
TLDR; all media, and all people, are biased, but they are not all equally biased. This bias can produce false beliefs. If you think false beliefs are a bad thing you promote the better actors and condemn the worse.
Also some news media actually reports on events that hurts the cause of their collective political leanings, some just don't. This isn't apples to apples.
There is a difference between withholding information, selective emphasis, and outright lies. They are all bad, but they are equally bad. If you want to make things better you attempt to differentiate better from worse actors.
TLDR; all media, and all people, are biased, but they are not all equally biased. This bias can produce false beliefs. If you think false beliefs are a bad thing you promote the better actors and condemn the worse.