Search Google Images for "Indiana Jones" and you'll see what's iconic. It's Indy with his hat and whip...period. Not Indy running from savages, but Indy standing tall and looking tough. That's the iconic symbol the website should've used.
In fact, as of July 16, the first image of Indiana fleeing Indians was only the 150th image in Google Images. Remember, these are arguably the most popular images on the Web. So 149 images of Indy without savage spearchuckers are more popular than Indy with savage spearchuckers. Hence the official website image isn't iconic.
Anything else you need me to explain about movie symbolism, Russ? Just let me know.
For more on the subject, see Indiana Jones and the Stereotypes of Doom.
Below: The first and most iconic hit in Google Images.