An adjacent building, already on fire, collapsed, spreading heavy burning debris all around it.
A similar building a bit further off did the same thing.
Heavy stuff from which the buildings were made, containing burning materials, fell on it.
It was not designed to carry the weight of that much stuff.
It was not designed to have that much fire applied to it at the same time.
Both happening to it at the same time just made the results inevitable, and unstoppable.
*****
As to various predictions:
I can conclude from a visual observation that a car that has been involved in a collision has been totaled—
—even though that determination will be officially made by an insurance representative later—
—and I should not be held to be a part of a conspiracy to have it crushed and smelted.
Your argument is that the reporterette just knew it because engineering? Come on.