There is a great difference between a few knocked-out bricks and a bulge in a steel skeleton in a building fifty-or-so floors tall. If you apply a shattering force to an area of bricks, those bricks will fail and leave a hole in the wall. The broken bricks will randomly remove or leave mortar around the margins of the hole. Those that remain will not be much effected, unless the walll was bearing a lot of weight on discrete points, and the hole is directly under one of those points. Then collapse is possible.
Not all the bricks in a wall are holding up anything other than the wall. They do not, by and large, depend on the integrity of bricks more than three or four places to either side of themselves.
Everything in WTC 7 was, in some way, coupled with everything else.
Thus, when you notice a bulge in the side of a steel-framed building, you can assume some wierd stresses are being applied to the whole structure. In a tradintionally-built structure, this would be a major problem, but still not that lethal. There are, usually, many more columns to take the load. This is why there was no global collapse of the other, lower buildings, even through they were totally staved in where debris hit their roofs.
In the case of the towers and WTC, nearly all load-bearing capacity was distributed around the margins. Thus, anything that compromised columns around the margins was potentially lethal. We may never know exactly which columns bulged. They were a bit preoccupied with other things at the time and had no real need to know anything other than that they had to pull the crews from the area for reasons of safety and most efficient allocation of resources.
We do know, however, that structural integrity was compromised, anmd that the buildong could not possibly respnd optimally to the increased and now somewhat randomized effects of heat.
Knowing, as we do, that steel frames do fail when left alone in fires of long duration have a history of failure, the most rational first conclusion that one could reach is that the building was destroyed by the thermal creep which is known to work on the steel of any steel-framed structure.
It is only logical to assume that collapse was due to some other cause ONLY if evidence for such other causes is observed.
None were.
No CD.