Except it wasn't the basement and first floor.

It was the first seven floors. Coincidentally, also the floors most of the higher-ups don't work on. Or at least that's how it's being reported, so I don't think people's outrage is absurd.

Any building with modern (last 100 years) insulation is going to have relatively equal distribution of heat between the floors. Except the bottom floor, where people enter/exit and mix in outside air.