Many users have other programs that may have a report or chart that UFT doesn't have so a GEDCOM file is used to transfer the data to that program. You must understand that the Detail fields do not transfer, so any report would lack these details. Most are not needed when a Basic GEDCOM, BMDB, is used anyway. I like the drop chart of BK so transfer to it for a reunion chart.
IMHO never GEDCOM to another program then expect to GEDCOM back to UFT. Really best to never GEDCOM into UFT, unless you are ready to do a lot of clean up.