Most guys in the top 100 don't play CH's, take Fergana for example, the top seed there is #136, the rest of the field is #162 or lower, Peter has proven he can get enough PTS and more money at these events.
What about last week when the weakest challenger had 4 players in the top 100?
Fergana is in a silly place in the calendar. To travel from Athens to Fergana it costs $2600, it takes two stops and 23 hours. Do you even consider things like this when you decide where players should be playing or do you assume they have a teleportation device? And then, what about the flight to France, how much do you think that costs? And how long is it, just before qualifying. That is why no one is there.