The Physics of seventy plus stories coming down in a pancaking where upper debris defeats the structure of the floor below and repeats for seventy floors cannot happen at freefall speed. But most citizens do not know that so the great lie continues to float.
You’re exactly right on all counts.
Okay, we have thirty floors coming down on one, then 31 coming down on 69, 32 coming down on 68...
Almost immediately you have one third of the whole structure coming down on one floor at a time, that floor collapsing, and coming down on the next.
You say it couldn’t happen. It did. Twice.