Making it literal is making it a cartoon.. when the lessons taught are deep..
Those are assertions of yours,
without any basis besides human opinion.
If there is another scripture, say, something Jesus said,
that refers to Genesis as “metaphorical”, I’d glady read it.
Otherwise, the “metaphorical” assertion is nothing but human vanity.
What’s your “ultimate” authority by which you judge scripture?
If it’s not scripture itself, then scripture is not your ultimate authority, your own “reason” is your ultimate authority. Read Gen 3:4 again after letting that soak in.