“Throughout history, well meaning people have disagreed on dogma and doctrine based on the same Sacred Scripture.”
Repeating the same thing again, doesn’t really explain why it should be regarded as important, or how the existence of disagreement renders meaning impossible to find.
For example, you disagree with Calvinism (or, actually, Augustinism), but your position of disagreement on the matter is untenable. The scripture is clear that even faith itself is the gift of God, “no man can come to me except my Father draws him”. That works have no basis in salvation “for those He foreknew, He predestinated to be conformed to the image of His Son... for it by grace, it is no more works... ye are saved by grace without the works of the law.”
Isn’t your appeal for the inability to figure out the scriptures, really your own thinly veiled attempt to cover up the fact that your own theology is not found in the scripture?
But a great many say that. Well meaning, educated, rational folks disagree on dogma and doctrine - and say 'the scripture is clear..'