Mystical experiences are a complicated issue. In one sense they seem to change everything in your life and in another they seem to change nothing. Unless the recipient is commanded to publicly reveal something (and this must be examined and tested very carefully both by the recipient and their spiritual director), then it is meant to be kept mostly private. The experiences make God more immanent in one’s life. It is easier to believe in and have a relationship with God if you know God exists. The experiences are there to draw the recipient into a more intimate relationship with Him.
The experiences, however, are in no way meant to set the recipient apart from the rest of the faithful. He or she is no more or no less important or holier than his or her brothers and sisters in Christ. The experiences are not meant to give preference over others.
This is what the spiritual director is aiming at. He is saying that these mystical experiences are nice. They are a gift and they have a personal meaning. They must not, however, be what your friend’s spiritual life revolves around. That focus must continue to be their personal relationship with Christ and their living that love in in their interactions with their brothers and sisters. These experiences may give your friend strength but the more important question is still, “Do you love and live in God?”
The spiritual director’s seemingly blase attitude may be purposeful so as to keep your friend humble about the experiences. Throughout my ministry, I have found that mystical experiences, while still uncommon, happen quite a bit more frequently and to more people then most have come to believe. It is only the private nature of these experiences which disallow the knowledge of them to spread widely. Your friend may be the only one in your parish who has had mystical experiences or they may only be one in a hundred who has. No one knows.
Personally, I think that your friend’s spiritual director will be good for them. He is quite center-of-the-road and that is what your friend needs. Some spiritual directors may focus on the experience so much that the focus is taken away from your friend’s life with Christ and some others may simply dismiss the experiences as mental disease, imagination, or a detrimental need for attention.