CWB states it very well. Women have always played a vital role in the Church -- beginning with the Annunciation to Mary, continuing on through the women who were the first to discover the resurection and on to the present day. The Church does not ordain women because, as already stated, sacred scripture and historic tradition lead us away from it.
Everyone has a vocation, which is their station in life and the role the play in the life of the Church as the body of Christ. Some are married, some single; some are priests, some are nuns. No one role is any less important to the daily functions of parish life. It's our responsibility to live out whatever our vocation might be to the best of our ability, and in keeping with Christ's teachings.
Yes, men can be ordained; however, even among the ordained there is a set hierarchy or "order" established. In fact, this order is where we get the word "ordained." So everyone has a role in the community (if they choose to fulfill it) and each has its own set of honors and privileges, duties and responsibilities.