Why is the following so hard for us to understand. The Church has spoken on this—yet we try to find any justification for our actions. How much more clear does the Church have to be. What will it take for us to listen and abide by the Church.
vatican.va/roman_curia/pontifical_councils/laity/documents/rc_con_interdic_doc_15081997_en.html
Liturgical Celebrations
§ 1. Liturgical actions must always clearly manifest the unity of the People of God as a structured communion.(89) Thus there exists a close link between the ordered exercise of liturgical action and the reflection in the liturgy of the Church’s structured nature.
This happens when all participants, with faith and devotion, discharge those roles proper to them.
§ 2. To promote the proper identity (of various roles) in this area, those abuses which are contrary to the provisions of canon 907 are to be eradicated. In eucharistic celebrations deacons and non-ordained members of the faithful may not pronounce prayers — e.g. especially the eucharistic prayer, with its concluding doxology — or any other parts of the liturgy reserved to the celebrant priest. Neither may deacons or non-ordained members of the faithful use gestures or actions which are proper to the same priest celebrant. It is a grave abuse for any member of the non-ordained faithful to “quasi preside” at the Mass while leaving only that minimal participation to the priest which is necessary to secure validity.
vatican.va/archive/ENG1104/_INDEX.HTM
Can. 907 In the eucharistic celebration deacons and lay persons are not permitted to offer prayers, especially the eucharistic prayer, or to perform actions which are proper to the celebrating priest.
vatican.va/roman_curia/congregations/ccdds/documents/rc_con_ccdds_doc_20040423_redemptionis-sacramentum_en.html#Chapter%20III
[11.] The Mystery of the Eucharist “is too great for anyone to permit himself to treat it according to his own whim, so that its sacredness and its universal ordering would be obscured”.[27] On the contrary, anyone who acts thus by giving free reign to his own inclinations, even if he is a Priest, injures the substantial unity of the Roman Rite, which ought to be vigorously preserved,[28] and becomes responsible for actions that are in no way consistent with the hunger and thirst for the living God that is experienced by the people today.
[45.] To be avoided is the danger of obscuring the complementary relationship between the action of clerics and that of laypersons, in such a way that the ministry of laypersons undergoes what might be called a certain “clericalization”, while the sacred ministers inappropriately assume those things that are proper to the life and activity of the lay faithful.[116]
[52.] The proclamation of the Eucharistic Prayer, which by its very nature is the climax of the whole celebration, is proper to the Priest by virtue of his Ordination. It is therefore an abuse to proffer it in such a way that some parts of the Eucharistic Prayer are recited by a Deacon, a lay minister, or by an individual member of the faithful, or by all members of the faithful together. The Eucharistic Prayer, then, is to be recited by the Priest alone in full.[131]