Likewise, the comparison between the Steelers handled a crisis and the way the Vatican handles a crisis does not, in itself, prove either that the Vatican is fallible or that the Steelers are a better institution (I'm not a big fan of either institution)(link). However, it is evidence of fallibility and, indeed, corruption within the Vatican.
However, both of these stories (like my own previous note regarding typos in the on-line English version of Rome's canon law) help to demonstrate to the ordinary reader that Rome's leadership is not something supernatural. They are men - and like other men they are fallible, sinful, and so forth. Their fallibility isn't proved by their humanity, but it is evidenced that way.
The fact that the apostles and prophets had the Word of God was attested by true miracles, signs, and wonders. Christ's own resurrection served, as one of its purposes, to testify to Christ's divinity and the truth of his message:
Wherefore he saith also in another psalm, Thou shalt not suffer thine Holy One to see corruption. For David, after he had served his own generation by the will of God, fell on sleep, and was laid unto his fathers, and saw corruption: but he, whom God raised again, saw no corruption.
Then certain of the scribes and of the Pharisees answered, saying, Master, we would see a sign from thee. But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas: for as Jonas was three days and three nights in the whale's belly; so shall the Son of man be three days and three nights in the heart of the earth. The men of Nineveh shall rise in judgment with this generation, and shall condemn it: because they repented at the preaching of Jonas; and, behold, a greater than Jonas is here. The queen of the south shall rise up in the judgment with this generation, and shall condemn it: for she came from the uttermost parts of the earth to hear the wisdom of Solomon; and, behold, a greater than Solomon is here.
But the Roman magisterium is merely human. It lacks any supernatural manifestations of God's favor. Benedict XVI cannot raise from the dead those who fall asleep during preaching as Paul raised Eutychus from the dead, indeed Benedict XVI himself falls asleep (we do not know whether it was during the brief homily or some other portion of the mass).
That fallibility is seen in practice in the heresy of mariolatry illustrated in two ways during Benedict XVI's Maltese Visit:
Pope Benedict XVI said he was "pleased" to be able to pray before her image and presented her with a Golden Rose "as a sign of our shared filial affection for the Mother of God."(source)(official source for those who don't trust the media)
He asked that she be prayed to as "Queen of the Family," a title introduced by Pope John Paul II to the Litany of Loreto.
Notice the three ways in which idolatry, in the form of mariolatry, is evidenced:
1) The offering of a golden rose.
2) The prayers to her and encouragement of others to pray to her.
3) The exalted title "Queen of the Family" given to her and intended to be used in prayer to her.
There is no Scriptural warrant for such a title for Mary, and the headship of a family problem resides in the Father. Furthermore, the context of such usage is the following:
Contemplating this mystery, we confidently entrust all our families to the gentle protection of Mary, Queen of the Family and Saint Joseph her spouse.(source)
58. The preparation of the engaged should be accompanied by sincere and deep devotion to Mary, Mother of the Church, the Queen of the Family. The engaged themselves should be taught to recognize that Mary's presence is as active in the family, the Domestic Church, as it is in the wider Church. Likewise they should be taught to imitate Mary in her virtues. Thus the Holy Family, the home of Jesus, Mary and Joseph, makes the engaged discover "how sweet and irreplaceable education in the family is" (Paul VI, Discourse at Nazareth, January 5, 1964).(source)
And perhaps most blasphemously of all:
Virgin of Nazareth,(source)
Queen of the family,
make our Christian families
schools of evangelical life,
enriched by the gift of many vocations
to the priesthood and
to the consecrated life.
Keep intact the unity of our families,
today so threatened from all sides.
making them hearths of serenity and
of harmony, where patient dialogue
dispels difficulties and differences.
Above all, watch over those
who are divided and in crisis,
Mother of forgiveness
If one cannot see that to engage in such devotion to Mary is to derogate from the glory and honour of God, simply be looking at what is being said, I am not sure that any amount of further argument will prove it to you. Indeed, I think that for some people the only problem would arise if Mary were referred to as "God." Anything short of that they seem to find acceptable, no matter how much worship is given her and power is ascribed to her.