How does 25 cars fit into itineraries with all live?

At 3 minute intervals on gravel the 25th is starting 1hr15m after the 1st. Assuming all being covered is desired, with no crossover and WRC2 gets nothing, a typical loop could be 6 hours or more. Where's the shorter days then?

Or are some top class drivers not going to be top class in reality, thus not necessary to see?