Ideally, NASA should be able to buy heavy lift services to send payloads to the Moon—up to about 45 metric tons to 'trans-lunar injection' which is about the same performance as the SLS Block 2," Pace wrote. "I was a supporter of SLS when it was created as NASA required heavy-lift vehicles to send humans to the Moon and Mars. At the time, it did not appear (to me) that a private sector heavy-lift vehicle would be feasible within two decades. Today, the situation is different, with heavy-lift options from SpaceX, Blue Origin, and United Launch Alliance.
The cynic in me is he’s trying to cozy up to Elon Musk to give SpaceX more business. Even still, the cost of Artemis and the SLS is absolute insanity.