It takes time for the barges to return the booster to the launch pad. They want to be able to launch Starship, have the booster land back at the launch pad, hav

It takes time for the barges to return the booster to the launch pad. They want to be able to launch Starship, have the booster land back at the launch pad, have the arms set it back down on the ground, and recycle the booster for another launch in just a few hours. Then the arms can be used to stack the booster and the next payload on the launch platform.