Why not? "late bloomer" refers not to what someone does, but when they do it.I do not think a so called 'late bloomer' could have done such a thing.
As to corruption in the RCC, Martin Luther, John Calvin, Huldrych Zwingli, Martin Bucer, Heinrich Bullinger, Theodore Beza, William Farel and John Knox - just for the featured names - beat him to it by a wider margin than I did.