If the US were Venezulua or Russia or China or France the gas could be considered “our” gas but it is not or at least for now it is not “ours”. In the US the gas is “mine” or “yours” that is to say it belongs to someone and that someone decides who to sell it to.
Would you propose keeping those who own the gas to keep from selling it as they see fit?
First, the gas probably does not "belong" to those who own the surface above it. Who does may be a corporation whose interests may not fit with that of myself, my progeny, or my country. In that case, I might well say "Yes." OPEC countries already do that.
Did we want to sell scrap iron to Japan back in the '20s and '30s? Did we still sell it to them in, say, December 8, 1941? Should we have sold it earlier? Hmmm. Liberty has limits.
What would you suggest if PRC bought out this nonrenewable national treasure against our national indebtedness to them, and started exporting it wholesale?