I know you haven't said that, it's me who said that.
What you are saying implies that according to you the steel beam from the 3 towers have fallen unto themselves or in their own footprint due to the fires in the towers, except simple laws of physics make this impossible.
No. Because of the pancaking floors, the two main towers fell mainly vertical. You can see this in the experiment I mentioned earlier.
In fact, the design of those buildings is exactly why they fell like that. According to physics, we would expect them to collapse no other way.
WTC 7 had a large hole in the top middle from debris from the other towers. That caused it to collapse inward toward that hole, when the fires weakened the steel. If the hole had been in the side of WTC 7, it probably would have toppled as you suggest.