Dear Benjamin:

Well the short answer is "because the Church says so."

As the document says:

Whereas in the past benediction was frequently added on to the end of another service or devotion, this is no longer permitted. Eucharistic exposition and benediction is a complete liturgical service in its own right and is to be celebrated as such. (my emphasis)

The Stations of the Cross is an ancient and venerable devotion which is designed to foster a devotion to and meditation on the mystery of the Passion of Christ. As commendable as such a devotion may be, it can never fulfill the purpose of eucharistic adoration, that is to draw us more deeply into the mystery of Christ's presence in the Holy Eucharist. Therefore, neither the Stations of the Cross nor any other devotion should be prayed during exposition of the Eucharist. (my emphasis)

The purpose of Adoration, which is a liturgy, is to Adore our Lord, not to perform devotions to our Blessed Mother, or do the Stations of the Cross, or any other devotion.

As an official liturgy, it is not a personal devotion to which we can do anything we want. As liturgy the Church regulates it. Period.

This is reminiscent to the old liturgical abuse of little 'ol ladies praying the rosary during the Mass. That was improper and illicit. The Celebration of the Holy Eucharist is not a time for personal devotions.

As the old adage says, "the proper tool for the proper job." Our job in Adoration of the Blessed Sacrament is to Adore our Lord, alone. One can honor our Lady and our Lord in these personal devotions at any time. For the Adoration of the Blessed Sacrament, adoration is the only devotion.

Or to be biblical, the Bible teaches us: (Ecclesiastes 3:1) "For everything there is a season, and a time for every matter under heaven." Adoration of the Blessed Sacrament is a season and time for adoration, not personal devotions.

The rosary, by the way, does not make us closer to Jesus through Mary, when Jesus is directly in front of us. When Jesus is right there in front of us, as in the Mass and in Adoration of the Blessed Sacrament, there is no need to "go through Mary" and our Blessed Mother would tell us that herself since she never looks to herself, but always points to her Son. In this case the "pointing" isn't needed since He is literally before our eyes.

A bottomline, if one does not understand the Church's reasoning here, is obedience. As St. Augustine, doctor of the Church, said, "Lord, those are your best servants who wish to shape their life on Your answers rather than to shape your answers on their wishes."

God Bless,
Bro. Ignatius Mary