Why would they wait to start this until they are ready to get back to the moon? This is going to take many years to design/build, so there is no reason to not s

Why would they wait to start this until they are ready to get back to the moon? This is going to take many years to design/build, so there is no reason to not start now. Plus its good to keep people innovating/working even if you are a bit away from actually needing the fruits of the labor.