I'm convinced there's forces out there who are trying to make these projects deliberately not work so that we can all collectively discredit the idea.

Naturally ventilated airports would probably have issues with fumes. Might not be a great idea.

If I believe correctly the Dyson headquarters was designed to be fairly efficient as well.

My father in laws house was intentionally designed to be naturally ventilated, thermal mass concrete slab in the middle, etc. And it's comfortably cool even on 40 degree days.