This is a classic piece of confirmation bias. If you want something to be true, and some official source can be misinterpreted as stating that it was true, then you will cite that official source as irrefutable despite the fact that you reject everything else that source has stated, and you will also insist that your personal interpretation is the only possible one. And yet you never say that NIST "admitted" that explosives could not possibly have been responsible for the collapse of WTC7, that they "admitted" that the fire was the primary cause of collapse, that they "admitted" that the impact damage resulted in the initial multi-storey buckle occurring too low in the structure to be seen in videos, or that they "admitted" that the period of near-freefall acceleration was expected from the predicted collapse dynamics. You don't want to believe any of these things, so when NIST states them in the main body of its report, you characterise them as lies. And yet, when NIST says that the collapse "appeared symmetrical" in a FAQ attached to its report as a layman's guide, you interpret this, not only as a claim that the collapse was in fact completely symmetrical, in direct opposition to all the evidence, but also as an irrefutable appeal to authority - NIST said it, so it must be so.
Congratulations; you get a truthiness point for making up a new absurd rationalisation for denying reality. As we see from post collapse photos, the rubble pile is in fact covered by the south wall, which is in itself an asymmetry. If all the walls had fallen inwards symmetrically, as you've just decided to pretend they did, then parts of all four would have been seen covering the rubble pile.
And, hey, didn't NIST "admit" that the building fell as a solid block, which is why it "appeared symmetrical"? If you don't believe them when they say it fell as a solid block, how come you believe them when they say that the only reason it appeared symmetrical was because it fell as a solid block?
If nothing else, you should be commended for your ability to get things wrong even when you could have got them right.
Dave