It isn't just my opinion. The source you cite is admittedly liberal, though not all contributors are. It is a favorite of Unitarians and other such "progressive" groups because it generally reflects their bias.
One thing is certain, though: Critics of biblical literature tend to think they get to decide what is literal and figurative based on no historical context, an English translation, and a 19th Century Tubingen weltanshauung.
No? Then offer a source for your views.