Excuse me??? What an uncharitable interpretation of my comment.
I highlighted an example of a more catastrophic mistake, familiar to engineers, which was apparently forgotten in this case. Bridges are resonant structures; this is 100% predictable through modeling but that was not done.
Sibling comments point out the Hyatt walkway (news to me, I only took first year mech eng but learned about "galloping Gertie" in elementary school because it was a local and recent catastrophe). Other comments note that the construction crew must have noticed. That this was not escalated points to a communication breakdown similar to the root cause of the Hyatt walkway.
https://en.m.wikipedia.org/wiki/Mistakes_were_made