At this point they would not.
But if H3 is as plentiful as is supposed, and can be mined with little difficulty, and the problems that hinder fusion power can be solved...
Then, the shallow surface of the moon holds more energy than all the worlds oil, and a modest sized tanker could hold enough H3 to run the planet for a year.
Or this energy could fuel development of the Moon and planets.
So this is not a sure thing, there could be less H3 than supposed , there could be a hard problem with collecting it or there could be an insolvable problem with fusion power.
This is aspirational , and if China does find the way, everyone will join them, so there is little to worry about.