How do you explain all of the det cord to the employees? The towers weren't your normal type of building, open floor about an acre big with a central tower with stairs and elevators. You would have to open a lot of ceiling to place some sizable charges on the floor beams and stairwells.
You are reading but you are not comprehending, I am not gonna spend all night explaining to you you that things can be done by as few as three sets of teams who does not know how the other two sets of operations work. Look up the Manhattan Project, which built the atomic bomb, no one person knew how to build the entire freaking bomb and they had no clue that was what they were working on until the bomb was dropped in Japan. It is to prevent full plans from falling into the hands of an enemy by one or two spys, etc...
Many manufacturing jobs are operated similarly, you know your role in installing a piece of material but you do not know how that piece was made, by another operation.
It is obviously over your head. Go back to doing what your thpe does best, parrot platitudes and cliches you copy from a TV mannequin or go play the word games and let those who knows what they are talking about explain these things...