Marshall McLuhan, a Catholic professor, who taught communications in the 1960 and 70's. coined the phrase, "the medium is the message". If the medium is only celibate males then that is the message. 
The message needs to be more open and inclusive. 
We are now in the 2017. That message needs to be relevant to our lives today. The failure to adapt is the problem. All churches are facing this. 
If Church teaching moves to more prayerful contemplation and a consciousness more attuned to the Gospel messages of compassion, love, social justice, Beatitudes, and forgiveness (instead of violence), we will find people who can connect with the Church.
I doubt that will happen because the current powers will not allow it. just as they rejected Jesus in His day.