Why is 3rd place % supposed to be higher than 2nd?

[Taraz]

I understand the idea that you're supposed to be gambling for first because of the 50-30-20 structure once you get into the money. But what's wrong with having a finish distribution 14-14-12 instead of 14-12-14 or something like that? Is the first distribution unsustainable? I just don't understand why whenever a finish distribution is posted that has more 2nd place finishes than 3rds the advice is to gamble more on the bubble and itm.