One very simple reason:
What’s so special about it you say? Bands have been doing it for years. Pearl Jam was famous for their surfing vids a long time ago. However, they credit Neil Young as their inspiration. However, Neil never did anything like this. While Neil was whining with Crosby, Stills, and Nash, Iggy was inventing a whole new concept for concerts. So, to put this in perspective for the younger crowd that’s used to punk and crowd surfing. The “wildest” thing people were watching was The Rolling Stones. The biggest hit of the year was “Aquarius”. And, the people most likely to have experienced the birth of crowd surfing ala Iggy would have been your grandparents. Eddie Vedder might have experienced it, but I doubt it. He wasn’t in pre-school yet.
So, I just believe in giving credit where it’s due. Although few will claim it, almost every hard rock band has emulated Iggy Pop for the last 37 years. You’d think Rolling Stone would know that.
Shame the peanut butter didn’t catch on.