Thanks for your questions. Let me say that the idea that CV's living in the world are truly, properly, betrothed to Christ and are to be called Brides of Christ and icons of the Church herself is right on. But this does not mean we must consider that Religious Women (and perhaps Men too!) are not properly Brides (or spouses) of Christ.
If the entire point of the consecration of virgins under c 604 is to create women who are Brides of Christ in a way which is entirely unique to them and requires others to be deprived of the designation, then it seems to me this is, at best, a largely irrelevant vocation. But I don't believe that is the entire point of the vocation. When I first began writing about it I may have mentioned that for some time I felt it was sort of a vocation without a "job description"; more, it bothered me that when I wrote about friends being consecrated all I could say was what they were not (not a Religious, not vowed, not called Sister, etc.). So I began to read more about the vocation. Once I had read the Rite more carefully and some work by Sister Sharon Holland, IHM, et. al. I was convinced that the vocation had an important positive content, real substance, that our world needed especially at this time. That content or substance is the qualified (sacred or eschatological) secularity of the vocation.
As I have explained in other posts, the term secularity has often had a pejorative sense to it and in religious vocations there is a sense of "leaving the world" --- though there are both more sophisticated and abjectly simplistic notions of what this means. When religious make vows of poverty, chastity, and obedience, their relationship to the world around them, and to "the world" constituted by those who resist or reject Christ, is substantially qualified. They do not live secular vocations. Until c 604 reinstituted the vocation of consecrated virginity for those living in the world, membership in secular institutes was the one vocation that claimed secularity as part of its very nature without the pejorative connotation. Still, more often than not aspirations to religious life were more marked than the secularity of the vocation. Lay standing generally was seen as secular, but this was similarly denigrated. But with c 604 and its revival of this consecration for women living in the world and called to serve [[ in the things of the spirit and of the world]], suddenly secularity takes on a new value, namely the value of the Kingdom of God.
We are living into a new (and ancient because it is Scriptural) notion of what will come to be one day when God is all in all. Our Christian lives are not about "getting to heaven", but rather being citizens of the Kingdom of God and proclaiming with our lives that one day there will be a single reality we recognize as a new heaven and a new earth. In Christ's death and resurrection God embraces the whole of God's creation and makes it part of his own life. God takes even godless death into himself and in the process destroys it forever. Again, one day God will be all in all. That is our hope, and it is a dimension of the Good News of Jesus Christ. So, given this eschatological vision it is critical that the Church clearly recognizes the possibility of consecrating those who live secular lives. That serves as a sign, in fact, a powerful symbol of this new and ancient eschatology.Regarding your questions:
Thanks for patiently reading to this point but the background was important, both the nod to the history of the Church's approach to secularity and to the way theologians are speaking about eschatology today. It indicates that there is a long history still needing to be shaken off and unfortunately, the CV's who with their very lives and commitments, should symbolize this step forward re both secularity and eschatology, are, in some instances not doing so. The reasons are likely complex and involve both a kind of allergy to the idea of being a secular vocation, and an ignorance of the eschatology I have spoken of above. Some will speak of "secular-lite" to characterize the secularity of their vocation rather than moving toward a truly radical vocation that affirms fully both its consecrated and its secular nature. Others, in seeking to do justice to the radicality of the vocation focus on its consecrated nature alone, that is, to the idea that CV's are Brides of Christ, but without really speaking of the secularity of this espousal.
In all of this I think you are right. There seems to be a resistance to accepting the secularity of the vocation, so much so that there seems to be a need to deprive women (and men) religious of the sense that they are truly espoused to Christ, but in a religious rather than a secular vocation. I believe that some of this resistance comes from the longstanding sense that secular vocations are 2nd class, but also, it comes from a missing sense of the charism of the vocation --- what I once half-jokingly referred to as the lack of a "job description". The Church clearly stresses that CV's are Brides of Christ, but until CV's fully and wholeheartedly embrace the secularity of this identity, the need to distinguish themselves in other ways will continue to crop up I think.