Efficiency. If you don't have to recover the booster, load it up and transfer it back to the recovery & restoration bay, you save time and money. Not to mention

Efficiency. If you don't have to recover the booster, load it up and transfer it back to the recovery & restoration bay, you save time and money. Not to mention if you can land the booster directly on the tower, clean it, fuel it up, and send it right back... imagine 4 Starships launching per day!