This is sarcasm of course. But think about it, Moses can't write about a global flood if he doesn't even know what a globe is. Moses can't write about the age of the earth, if he doesn't even know what the earth is.
Unless you want to reverse course and assume that God did not actually accommodate the ancient Hebrew-speaking audience, and that God gave them information that would just confuse them, such as the theory of general relativity and heliocentrism. You don't think that anyone would find it confusing that they didn't fall off the earth if it were spinning and flying through space at thousands of miles per hour?
You see?
@Eternally Grateful.
And so, what most mainline Christians do is, we say exactly what you said. "What good would it be?".
Why would God use Hebrew to speak to Moses?
So that he could understand, of course we agree.
Why would God choose words like "humanity" and "life". Because that's who Adam and Eve are. They are representatives of humanity and life. Eve is the mother of all living and Adam represents all of us through sin and through identity as dust, among many other things. These words hold meaning specific to the cultural context of Moses.
God accommodated the story of Genesis to fit the audience so that they would understand it.
And everyone knows this. And so now we can ask, how far does that accommodation go?
Language is one of the easiest concepts for people to understand in terms of accommodation because it's so obvious to us that we are forced to think about it. Of course God would accommodate language.
But what if God accommodated more than just language, to make the Bible understandable?
What if God changed (or better yet, what if God allowed Moses to explain in his own personally selected hebrew words like "Adam and Eve, humanity and life") more than just Adam's name? We don't know what Adam's name originally was. But God accommodated, to a Hebrew concept (humanity) that people would understand in the Hebrew world.
And indeed, upon close study of this subject, it becomes clear that this is precisely what God did with many aspects of Genesis.
An alternative being that rather than a verbal dictation from God, God inspired the Biblical authors, and then the authors used their own language, words, culture etc. to write the story in their context. God isn't switching between half a dozen different languages throughout the Bible. Rather, God is letting human authors write the Bible through their own words and culture.