The comment was about finding the bones below the museum not about the museum being built in an archeological hotbed.
Nitpick: paleontological, not archeological.
Denver is not exactly an archaeological hotbed, to put it mildly.
Many major US cities have museums like this. It wasn’t built there because of the dinosaur archaeology as far as I know. This core was found during unrelated digging in the parking lot of the museum, so I think it is a coincidence.