The OP is misleading you. You can run up a furnace to very high temperatures just by having a hole that air rushes through (with a fan, or wind). You don't need to reach 2700 to affect a steel structure - you can weaken the steel and produce strange unplanned loads at lower temperatures and cause failure cascades.
Its amazing how perfectly WTC7 fell directly into its own footprint.
The OP is misleading you. You can run up a furnace to very high temperatures just by having a hole that air rushes through (with a fan, or wind). You don't need to reach 2700 to affect a steel structure - you can weaken the steel and produce strange unplanned loads at lower temperatures and cause failure cascades.
Here is the NIST story about WTC7: https://youtu.be/PK_iBYSqEsc
Myles Power made a video about WTC7: https://youtu.be/7PpsCCTMP8w
I don't endorse him on other topics, but this particular video is good.