Two Different Databases

In order to appreciate the distinction between the FamilySearch data-gathering database and the FamilySearch Family Tree conclusion-publishing database and the strength of the respective search engines, go to FamilySearch.org (you will not need to sign in) and do a “Search” for a female with given name = Ivyl and with dad's given name = Herb and evaluate the results. Then sign in to FamilySearch.org/tree and repeat the exercise by doing a “Find” with given name = Ivyl and with dad's given name = Herb and notice that the latter points to a unique individual.

The database at FamilySearch.org contains more than 3 billion records of a wide variety, from census records, to BMD records, to military records, to migration records, etc., and some of the people in those recent records will be living. Some of those records will document relationships, such as husband-wife in a marriage record.  The database at FamilySearch Family Tree is for publishing the family relationship conclusions that users have drawn from the records in FamilySearch, and those conclusions will not pertain to living individuals (except for the user).