It just reads like your making fun of the way they drill the ball. Doesn't matter either way. Just how I read it.
Keep in mind that most proshop do not take the time to watch someone bowl, find their PAP, and go from there on making a suggestion for equipment, or drill patterns.
It is usually just a simple what do you want the ball to do? Which ball do you want? Then they drill the ball pin around the ring finger, MB near the thumb on the positive side of the ball. Then the weight hole as needed with no consideration for effects it may have other then to correct the static weights.
Most weight holes still get put on or around the bowlers PAP. Usually around 5" plus from the pin or so. This if you go by Mo's information on gradient line balances holes would be a P1 location that reduces performance.
As for others with P3 and P4 weight holes it may be drilled by someone with a little more knowledge trying to help someone whos says the ball doesn't hook enough. Part of the problem is likely to be too much ball for the condition. I think it is very common. Bowling for many these days is all about the hook. More hook equals bigger scores in todays bowling games.(think MLB and "chicks dig the long ball") Not the idea that a ball that hooks less and fits the condition will score better and enable the bowler to get in more consistent high games for a series as opposed to maybe the first game.
Be good, or be good at it.