I did see the Giro last year and unlike you I apparently paid attention because he lost positioning on the flat/descending parts of the gravel not on the ascents. Which is exactly what I said before - downhill or fast ridden flat passages: Difficult psychological because it is technical. Uphill stomps like in Flanders where basically no one crashes and the speed itself is not high: Not difficult psychologically.
As
@Berflamand said, he messed up in Brantse Pijl because of the gutter - an issue he wouldn't really face in Flanders. And it's a very small sample to draw conclusions from.
Given that we're fully into armchair psychology here: What he showed in Itzulia with regards to difficult technical descends tells me that he doesn't really look like he has any psychological fear issues left from his crash. And that was a bigger sample size than one Brabantse Pijl.