The challenge to the historicity of the united Israelite kingdom is hardly a concern for academics alone. The era of David and Solomon is the classical, formative period in Jewish political history, analogous to that of Athenian democracy or the early Roman Republic in the history of the West. It is a symbol, of course; but like all important symbols, it also holds out hope for the future:
Psalms 89:18 For the LORD is our defence [magen*]; and the Holy One of Israel is our king.
Ezekiel 37:24-25 And David my servant shall be king over them; and they all shall have one shepherd: they shall also walk in my judgments, and observe my statutes, and do them. 25 And they shall dwell in the land that I have given unto Jacob my servant, wherein your fathers have dwelt; and they shall dwell therein, even they, and their children, and their children's children for ever: and my servant David shall be their prince for ever.
*Magen David, hoisted over the ruinous heaps of the [formerly] Islamic cities of the Middle East.