Perhaps it would be more accurate to say it was rejected due to overly aggressive noise removal. When viewed at full resolution and 100% zoom, everything in that image looks very smeared. I mean, look at this part. It almost looks like an artistic/oil paint filter has been applied:
There's no detail.
And the edges that do remain look over-sharpened. See this for an example:
Note that highlight on the outside/dark line on the inside? Very over-sharpened.
Also, look at the top of the image, you've got a good chunk of it repeated at the top.
I don't know how that happened, but it's odd.
On top of all of that, it's not a very compelling image. Perhaps reframing it so that we don't see the path underneath the cameraman's feet and the people are in the lower left cross-mark (using the rule of thirds) would have been a better photo to take. Next time, consider photo composition when you're taking photos and not just trying to capture a moment. What I mean is, this is fine if you want to say, "Look where I've been" on Facebook, but it's not very useful in a stock library.
Does that help?
It helps very much. Thank you!