When speaking of an "entirely free disposition", the Council called attention to
And at the same time
This is why Mary isn't a total necessity for us, but a necessity emanating from the will of God:
"For all the salvific influence of the Blessed Virgin on men originates, not from some inner necessity, but from the divine pleasure. It flows forth from the superabundance of the merits of Christ, rests on his mediation, depends entirely on it and draws all its power from it."
(Vatican II, Lumen Gentium §60)
This will of God was particularly expressed on Calvary, when Jesus said to the disciple "Behold your mother" (Jn 19: 25-27).
For this reason the Bishops of the Church have always proposed to all baptized a path of personal and communal devotion (or consecration) to Mary, in order to grow in their interior life with Christ.