Say Rogla attacks halfway through the race with a handful other captains. Slovenia have no helpers left, or only tired ones. The group quickly builds a gap while everyone mark each other behind.
Horrible situation for Pogi! He'd need to react quickly and solo across to the group. If he waits around, expecting other nations to chase and control it, he may instead see wave after wave of small attacks in the peloton as everyone tries to escape wonderboy.
Rogla ahead is never a credible bluff, everyone will still lean on Pogi. Rogla will want to grab his own chance, so he won't drop back from a group in order to pull for Pogi.