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Even assuming 10 ppb of He-3 in the lunar regolith, you'd need to process 150 tons of the stuff to get one gram of fuel.

http://fti.neep.wisc.edu/pdf/wcsar9311-2.pdf

Mind you, if we eventually automate extraction industries the economics for a lot of things change.

> I'd much rather have industrial machinery churning out tons of pollution on the moon then on the earth.

Would you pay twenty times as much for your computer in order to make that happen? And would most people do likewise? It's the answer to that sort of question that determines whether something gets done.