The facts are that Rossel was 1-2 secs behind Gryazin (who won the stage) on the splits before getting to Oliver. These splits already included some foggy sections.

After Oliver pulled out right in front of him in the fog it is basically ridiculous to measure any seconds.
During first few corners he can see Olivers car in the fog, then visibily drops to a few meters. Pushing in that case when you know there is a car potentially 10-20meters ahead that you can't see would be downright crazy.

What would be even more ridiculous is changing the results and removing title chances from Rossel weeks after finish. For sure Rossel could go a few seconds faster on Sunday if he had been given different time.

The big unanswered question from me is why didn't race control signal Oliver that he should let Rossel pass. Don't Rally2 have same system as Rally1?