Well a average former WRC driver or should I say Rally1 driver becomes one of the top drivers when thay step down to lower categories. Somehow thay way ahead of of others even though they are not showing that potential in Rally1 car.
Look at Greensmith for instance. Slowest guy in Rally1 and suddenly top 3 in Rally2.
Toyota needs to shine in MC with just 5 cars to accelerate sells so they need drivers with good credentials and so a former Rally1 drivers fit nicely to tha role.