Catholics who were baptized are CATHOLICS.  As far as you not knowing "a single liberal" at your parish, means that you don't know many parishioners really well.  How many parishioners in your parish have families that number 7-10 children?  How many have children with serious physical/mental disabilities?  Authentic Catholics are not those who worship the institution of the church.  They worship God.  The two are not identical by a long shot.

Most couples do use contraceptives---not NFP---and they do so because it takes lots, and lots of money just to raise 1-3 children today.