Creative Speculation
In reply to the discussion: 9/11 Free Fall 7/18/13: Dr. deHaven-Smith and "conspiracy theory" [View all]Ace Acme
(1,464 posts)NIST's number one objective was to explain why and how the buildings collapsed.
Collapse of the core was part of explaining how. Not only did they not do so, they even claim they did not analyze the collapses.
The reasons for the collapse of the core may be obvious to you with your rudimentary knowledge, but you provide not a shred of evidence to support your claim, no authority for the belief that the cores were too slender to stand 40 stories tall, no evidence that the cores toppled, which would be expected to leave a stereotyped debris pattern on the ground--including relatively intact floor elements.
The only evidence I've seen for the collapse mechanism for the cores is the behavior of the north tower "spire", which after swaying a little bit appears bizarrely to have fallen straight down.