Maybe we should ask Mike Miller. Here's a guy who bowled on tour for years, WITHOUT much success, if any. He was just your average run of the mill fudger.
Then one day, he decided that he needed "more ball" to compete with the guys on tour. So he took his thumb out of the ball and started revving it up like the rest of the pros'.
Mike had the ability to cup and throw the ball, using only his 2 fingers, WITH a great deal of consistancy. Lo and behold, he then started cashing on tour and winning titles.
Many PBA bowlers couldn't believe what was happening, and became very jealous..!! They started to complain about the weights in the ball, how now you must not have more than 1 oz. of top weight, the lane conditions are too easy, there's too much oil on the lanes, ect..ect...ect...
And so, all the complaining/jealousy lead to what we have today. The constant changing of conditions, less oil, sport crap conditions, ect...ect...ect... =:^D