That's a good theory. last year I planted in a self watering container a variety I call Red Lebanese. It didn't make brebas before, but this year it has at least 25 brebas. The self watering container had water when stored overwinter, so it always had a water source through the winter. However many other varieties that were bone dry through winter in my garage also have a couple brebas.
You have a good theory and it is possible that keeping the tree happy the previous season, and remain healthy through winter will produce good breba crop.
The fig growers in the pacific northwest where rain is abundant in winter, rely only on the breba crop.