Turntable bearing greasing

A friend and fellow hoe owner had a question I thought I knew the answer to. He has been told that the grease zerks at the front and back of the bearing ring don't completely grease it and that it has to be hand packed on occasion. I thought they were the sole bearing greasing method and the hand packing under the plate was for the swing gear and ring. This isn't an argument between us as neither of us want the prospect of a $$$$ swing bearing replacement someday!

Turntable bearing greasing