The ability to fly 500 kts through the grand canyon is impressive. But it seems to me that it is quite removed from the skills that we use 99% of the time in the job we do.
I think that this skill, in itself, is beneficial. But those who have done it, and think that they are special because they have done it, are probably the ones most likely to undervalue the skills of the other members of the crew.
I don't mind getting advice from the captains and F/O's, since I view these years as an apprenticeship. But I do object to having my experience belittled. And even worse, being aggressively berrated for something completely removed from our SOP's (eg... putting ticks on the notams and flight plan).
As I have read from what others are writing, the ability to work well in a crew seems to be a skill of major importance. Marginalizing and bullying a member of the crew, even before you leave dispatch, is not a great example of team building.