Actually, on matters of faith and morals we must all strive until our last breaths to "agree" with the Church.

No, because the magisterium -- which, as I keep saying, is not "the Church -- has been wrong in the past, and may well be wrong now. And please don't claim that the magisterium never changes. In his 1864 encyclical, Quanta Cura, Pope Pius IX called the "erroneous opinion ... that 'liberty of conscience and worship is each man's personal right, which ought to be legally proclaimed and asserted in every rightly constituted society'" "an insanity". Vatican II's Dignitatis Humanae said that such freedom "is a right of all humans". These two teachings contradict each other. That's just one example, there are others.

You would have the members of the Church marching in lockstep, to a tune called by the magisterium. You would also have all surrender their consciences to the magisterium, which is slothful.