.
What you are missing is that there isn’t any place that says they are.
Angels are huge reptile-like warriors that exist in the realm of the Father, the spiritual realm. They are individually created beings, not biologically created like life on Earth.
That is why they are called “sons of God” in Genesis.
Every individual special creation is a “son of God.”
We will become sons of God too when we receive our incorruptible spiritual body at the First Resurrection. (if we are a part of that resurrection).
Check out 1corinthians ch 15.
And I say that angels have bellybuttons. Care to dispute that? Then provide me with a Bible link that disproves my assertion!
Can't do it? Then I win the argument!
< / burden of proof example >
Regards,