Yes, I would say, very much so.
Primoz, IMHO, is a mentally unbeatable pro cyclist.
CSC‘s rider Christian Müller once said about his then Team General Manager, Bjarne Riis, that Bjarne is mentally unbeatable. I think Müller was right. Bjarne went to the extreme as an active pro rider. He asked the questions, and received the answers he needed. This made him unbeatable. He went on to win the Tour again, this time with Sastre - years after Müller‘s quote.
With Primoz, it can be compared. There has certainly never been a ski jumper who had not been scared before flying from Planica‘s Letalnica hill. These are experiences only to be made by extreme people. If you decide to face such challenges, everything that comes with it certainly changes you irreversibly, as an athlete and as a person. As an athlete after changing into other disciplines of sports, you‘ll benefit from these past experiences - no doubt about that.