The debris from the neighboring towers caught WTC7 on fire.
The fireman did not have any water to suppress the fire in #7.
WTC7 burned for over seven hours. The fire in the core of the building reached temperatures exceeding the point the steel lost its compression bending ratings. The weight of the building compressed the beams and they collapsed. Gravity did the rest.
I have not studied statics, mechanics and structural engineering since 1985. However, that is why building structures out of wood has an advantage in fire situations over steel.
That is an interesting narrative, but I don’t think it holds up under scrutiny.
At your leisure take a look at the history of building collapses all over the world, and look at the details about buildings that fell in their own footprints.
You will figure out the pattern...