But surely harvesting is especially useful if you plan on breastfeeding? It's to supplement them with in the first few days, if necessary, rather than giving a formula top up. And she may still use some of what she harvested if establishing BF doesn't go smoothly, or if his blood sugars drop etc.
Now, she harvested about 100 times more than she will ever need, which is completely ridiculous!! And I think she probably did intend for it to bring on labour... thank god it didn't, with a footling breech inside her!!