We use trees though. We build all kinds of things with them. Granted I would rather see native revegitation, often not great for building with depending on where you live. But given the circumstances and timescales involved, planting trees may give us some buffer time in the form of an initial dip in carbon.
Trees can be one element of many to mitigate emissions, but too often trees are bandied about as a complete solution, and it's greenwashing that distracts from the true scope of the problem at hand.