God assigned the tribe of Judah to be the caretakers of the oracles. The real issue in this controversy is faith in God's sovereignty and His faithfulness.
God gave us a calendar, assigning the responsibility for its maintenance to the nation of Israel, not to the church or private individuals.
The real issue in the calendar controversy is not astronomical, but faith in God's sovereignty, providence, and His right to assign responsibility.
The calculated Hebrew calendar reflects God's faithfulness in providing His children a reliable calendar. Concocting one's own calendar is presumptuous.