Not necessarily true,remember that when you pack the bearings properly,they are actually over-stuffed to some point,when they begin to run-in,they will dissipate the grease,even out,and loosen a bit.I've been doing this my entire life,I've worked on Heavy-Trucks and Equipment for almost 25yrs.You set them just where you feel interference,if it doesn't line up,go a touch tighter,it will be fine.
