[Question] Is CDT with precommitment enough?

Logical decision theory was introduced (in part) to resolve problems such as Parfit’s hitchhiker.

I heard an argument that there is no reason to introduce a new decision theory—one can just take causal decision theory and precommit to doing whatever is needed on such problems (e.g. pay the money once in the city).

This seems dubious given that people spent so much time on developing logical decision theory. However, I cannot formulate a counterargument. What is wrong with the claim that CDT with precommitment is the “right” decision theory?