You replied: Absolutely not. David sat on God's throne as King over God's chosen people.
Ok, the throne David sat on was not at the right hand of God the Father. And yet, Jesus, who sits at the right hand of God, the Father is sitting on David's throne. Do you realize how convoluted that is. In order to make your theology coherent, you are going to have to get your thrones straight.
Before there was a "King" in Israel, God reigned from His throne and the people knew it. But they wanted a "King" just like the other nations wanted - so, God's throne became available to "man" to sit on it and reign over the nations people. That throne became "David's Throne" on earth even though it is God's Throne. God revealed that one of David's seeds will one day reign on that "throne"; and it happened when Jesus assended up to heaven to sit on it with the Father. You've seen the strong verses that indicate that conclusion - how do you understand them?