

Iron, aluminium, titanium, oxygen, silicon, phosphorus, potassium, I could go on listing elements at great length. There are plenty of resources out there. Celestial bodies are made of resources. You name it, you can find it out there in various abundances.
Helium-3 is just one of the few things you can find out there that is basically unavailable on Earth. It’s myopic to focus solely on that.
Okay, but not sure what that has to do with my point. It still supports the notion that giving weapons and similar supplies to a party fighting a war involves you in that war.