IC West has won titles in wrestling, and been to the state tournament in baseball and BBB recently. So Regina is good at 1 sport, that doesn't make them more successful overall.
Things cycle, Dowling is on an upswing currently. Valley went on a streak of winning like 4 or 5 straight FB titles and 4 or 5 straight baseball titles too about a decade ago. Eventually the pendulum will swing back away from Dowling.
At this point I highly doubt it. Dowling just has way too many resources they can utilize and they have a tight process in place. Plus, as the DSM city schools continue to struggle guess who gains from that?