It is worth noting that prior to post-exilic monotheism, Yahweh was originally construed as the divine king of Israel, the patron god of the nation, but who ruled at the consent of El-Elyon as one of the "sons of Elyon". Each nation had their own god and Yahweh jealously insisted that the Israelites worship him rather than the gods of other nations. This parallels the role of Baal in Canaanite religion (Baal was the adopted son of El, who ruled at his consent), and Baal -- particularly the reintroduced Baal from Phoenicia/Syria -- was the main competitor of Yahweh in the popular cult. The storm theophanic language applied to both Yahweh and Baal was the same -- they rode the clouds as their chariot, with the winds (= cheribim, who were personified winds) as the chariot's wheels, they spoke through thunder, their arrows were the lightnings, and they both battled the chaotic powers of the Sea (e.g. Leviathan/Lotan). So in this older cult, Yahweh was not the highest god -- he was a son of Elyon. But eventually, Yahweh became identified with El and thus language pertaining to El also later came to be applied to this god. In some quarters, this identification gave Yahweh a consort Asherah (who was El's wife in Canaanite myth). In other quarters, Asherah became assimilated to Yahweh as a hypostasis (e.g. as Yahweh's face, presence, as his wisdom, etc.).
But in the post-exilic period, only one god was permitted in the nascent monotheism....thus all the other "sons of Elyon" became demoted to angels or "princes of the nations" (as in Daniel), and the name "Yahweh" itself was discaded as too limiting and anthropocentric for the only true God...and meanwhile God was perceived as more and more remote on account his his insurpassible glory and greatness, which necessitated a greater reliance on angelic intercession (hence, angels are the ones who provide revelation in Tobit and Daniel, not God). Yet the memory of the kingly god ruling at the consent of the aged creator god did not die, for Daniel employs this time-honored mytheme in ch. 7 by describing a heavenly merkebah vision of the Ancient of Days (= El) who delegates royal authority on the "one like a son of man" (= Yahweh), and thus the original language used for El and Baal/Yahweh are applied to these figures...El was the aged "father of years," Baal/Yahweh was the "rider of the clouds"...here the father figure is the "ancient of days" and the "one like a son of man" "walks on the clouds". So the older relationship between deities has been recast in a new form consistent with monotheism.
Then Christianity arose, it drew on these traditions directly. Jesus was identified with the "one like a son of man" who ultimately rests on a Baal/Yahweh figure. The Father-Son relationship of Jesus and God, and Jesus' role as the "king" of the Jews and the ruler of "the kingdom of God" also reflects the older mythological ideas. And so OT texts that referred to Yahweh were ripe for the picking, and the employment of kurios in the LXX also facilitated the application of Yahwistic OT passges to Jesus, as a secondary figure like the "one like a son of man" in Daniel.