What's the consensus? Did most of the firefighters, capts, Lts, and others determine for themselves that WTC 7 would collapse? Or were the majority told that it would collapse?
I doubt if any firefighter makes judgments based on certainty of future events. Catastrophic events like fires are unpredictable by nature. The questions you would need to ask are:
1. What is the probability of collapse?
2. What is the probability of successfully fighting the fire and avoiding collapse?
3. Are there lives in danger, or just property?
One firefighter may think the fight should continue if there is an 80% chance that the building will collapse without intervention, that there is a 60% chance that it can be saved, and that a few lives can be saved by continuing. Take the lives out of the equation, and he may not think it's worth it.
Another firefighter may come to the same conclusions WRT the probabilities, but think that it's not worth fighting the fire in any event. However, the chances that any two firefighters will come up with the same probabilities are small.
Do you begin to see why it is essential that they follow orders instead of following their gut? You can't make these decisions by consensus, for there are so many different variables that will be interpreted differently by so many different people. Someone has to make a decision. It may be right or it may be wrong, but everyone involved needs to abide by that decision once it's made.
In short, the situation was nowhere near as cut-and-dried as you make it out to be. Conspiracy theories tend to paint the world as being simple and easily modeled with stick figures and mechanistic motivations. That is simply not the case in the real world.