Really once you acknowledge they are not God's representatives on earth, everything they say in his name needs to be questioned doesnt it.
And I would add to that, once you accept they are not appointed by God, most of the teachings come crashing down.
For many years I taught and believed that everything WT believed was based on the Bible. But now I see so much of relies on INTERPRETATION by the GB, AKA FDS, and once you doubt they are God's organization you able to see the INTERPRETATION is weak and contrived.