Standard oars are greatly affected by adverse and changeable water conditions and offer little to no stability, especially when you are trying to apply maximum force to the blade. One rogue wave can knock you completely off your balance and cost significant boat speed.
One of the overwhelming review comments of the RANDALLfoil design is the incredible stability the design offers. Blades with foils are simply not affected by the changing water conditions as wave energy does not disrupt the movement of the blade and loom during the stroke.
Consider how your oars would perform under these race conditions?