Who? They're all on the same team, team USA! Or are you implying the glacial pace will inevitably mean China gets there first?
Artemis 3 isn‘t just depending on one, but two super heavy launchers that haven‘t even left the ground yet.
And if you put Starship in the critical path, why would you spend billions to introduce another bottleneck that‘s literally just duplicating Starship‘s ground to orbit capability?
If NASA agenda really only was getting the USA to the moon, the only rational choice would be doubling down on Starship all the way.