In spite of what Bishop Tobin states,  there are many reasons why people leave the church [and it isn't all FAITH related.  Apparently what he expects from the laity is HEROIC SANCTITY.  Some reasons for leaving:

One area is the clash between Orthodoxy and Orthopraxy.  Too often the official church [hierarchy/clergy] expects people to believe, "We've always taught this----" forgetting that there is such a thing a "Fact-Check" in today's world.  People can get on line and check out---if a teaching has ALWAYS been taught.  More often than not, it hasn't.  

Likewise, people expect to see their priests, bishops PRACTICE what they preach.  While some priests and bishops certainly do----others live, not like those who serve the people of God, but rather, LORD OVER the people of God.

Finally, the documents of Vatican II and the 1983 Code of Canon Law refer to the need to consult the people on issues.  Yet, we have no formalized structure for reading the public opinion of the Church.