This whole procedure causes a lot of noise, and there's no way any conspirators could contain the resulting cacophany of demolition work. Everyone within several blocks would be aware that the building was undergoing major work. None of this could be achieved under the noses of any otherwise unsuspecting employees within the building.
The WTC towers had undergone extensive work and renovations providing assess. So there could have been plenty of opportunities to use the elevator shafts, evacuations, special access floors, and power downs to access and plant devices
on the core columns of the Twin Towers.
Bad guys could, of course, have forged maintenance badges or otherwise piggybacked onto legitimate maintenance efforts.
There have been many conspiracies that have remained secret for long periods of time, like the Manhattan Project, 130,000 people and a cost of 2 billion.
Trying to say that because we can't exactly figure out when, who, or how it was done, automatically gives you the right to throw away the laws of physics is a fail at countering the science of the collapses.
Realistically, your only option would be to murder them prior to detonation, as I can't see any of them willing to perpetuate the lie by volunteering their presence inside when the charges are detonated.
Trillions of missing dollars, and some of the most powerful people behind the scenes will keep people quiet. Ever hear of the Northwoods Project, and how long that was kept quiet?
The fact is that the mass of the buildings, especially the lower parts that were more robust, should not have provided "minimal resistance" and just moved out of the way and succumb to the destruction in the short amount of time the towers fell in.
That part of the explanation that NIST was tasked with, has NOT been explained. They just say assume that the falling mass pulverizing the lower parts of the towers, was to be expected, physics and science and the law of conservation of momentum be damned.
Those massive structures should not have collapsed in the short amount of time that they did without some "help".
To say this doesn't matter because no one has confessed is an absurdity.