The simple answer is the priority schemes guarantee a number, but not a good one. The priority schemes help you have an opportunity to join the ballot reserved for first timers, be it one ticket, two tickets or four tickets. Your number will be randomly drawn among the available numbers REGARDLESS of whether it is a good or bad number. After that your number will be drawn again with the second timers if you didn't get one the first round.
This explains how second timers can defy the odds and end up with a number that is not always at the tail end after the first timers. In a way it is to give them a chance really. It is bad enough you hardly have any priority, it will be worse if you are always picking trash bin unit or get out of range number.
I beg to differ that priority scheme guarantee a number



