A good perspective. I never post where I traveled to (unless a friend somehow tags me and mentions the location we where at) on social networks even if I have photos, souvenirs and merchandise from the trips.
I tell people where I've been only if the ask me during a conversation. Going around babbling about "when I was in..." seems brash and boastful.
No matter what the author said, traveling opens up your eyes if you truly engage with the local culture.
Those that travel and don't tell anyone, but rather just enjoy the experience -- are they narcissists?