It's not so much what their interpretation is of the specific article is, it's more that you might find more information from someone who has info that was left out, or maybe another source that has conflicting information.
Could you show us a few not so biased news sources? I suppose this will also vary wildly by topic. A news outlet might be narrative/propaganda driven on one topic, but not about another.
It's so much mess (through corporate ties or money) to sort through, it's hard to trust any of them anymore
If it's free from a for profit company, you're most likely the product