With a properly adjusted bearing, which has absolutely no play in it, then all of the ball bearings always make contact with the Cup and Cone, evenly Distributing all of the forces and weight over the entire assembly. Back in the day when I used to race, many many years ago, people were obsessive about resistance, and ran their beautiful campy hubs with play in them. Within a couple of months, either the cup or the cone was ruined in one section because all of the forces were concentrated on one or two bearings, instead of being evenly distributed over all of them.
So do not adjust hubs so that they have play in them.