There's a simple way to think about this that doesn't require doing a ton of research and number crunching. Think about the volume of fuel in a single airplane, about 7,000 gallons for a 737, or about 100 55 gallon drums. It's nowhere near exact, but you can roughly equate that volume of fuel to the volume of volume of wood to compare carbon - I'm pretty sure this is being very generous to the energy density of the wood, but it gives you an upper limit on what the wood could be sequestering (I think in reality jet fuel is something like 2-3x as energy/carbon dense per m^3). Now think about how many planes take off every day from an airport, and the volume of n*100 drums.

It's just nowhere near in reality, and we're not going to make a large dent via sequestration, the "finite" airports is functionally infinite for our purposes. We have to start making carbon neutral fuel.

That said, manufacturing concrete is incredibly carbon intensive, so avoiding making the amount we would've needed for this building is a pretty good win.