I have to listen to all the mfg's presentations and they claim #1 cause of bearing failure is over greasing, granted they are talking sealed bearings and pushing out the seal
But they also mentioned the bearing buddy
1- They claim that over greasing will ruin the back seal on the hub when over greased allowing dirt, water and etc in the hub.
2- They claim if you just hit it with one or two pumps all the grease is in the dust cap never reaching the bearing
3- They claim the spindle washer blocks most of the grease ever getting to the outside bearing muchless the inside.
4- If you put enough in that you force it past the outside bearing and to the inside bearing and then push it to the seal but are lucky enough not to damage the seal, the grease is packed in so tight it's actually hard on the bearings
5- Most greases used or not for high speed bearings
Whether this is right I can't say