My observations and experience tell me something different.  Those that have been raised in even non-observant Catholic homes are indeed aware of the general flow of the Church.  Those who have no experience growing up with the faith in homes with "nones" who were once Catholics, also have some awareness of the currents of Catholicism - in particular, Pope Francis.  I would not write them off so easily, Tri.  They have no interest in being members of "your" type of Church, but they find an attraction to the messages of Christianity, of the mercy and love found in Pope Francis, and many of the clergy, religious and Catholic faithful they encounter.  They clearly reject the rigidity of the "institutional" church and likewise most of its bishops.  And their desire to help others and the earth is amazing.  Too many are lost to us for various reasons, but it is rarely of their own doing.