Fusion fuel is so energy dense that fusion plants will never produce industrially meaningful amounts of helium.
I think this is why he labelled the comment 'Tongue in cheek'. Thanks for pointing it out explicitly tho, was not aware of this.
Can't they irradiate tanks of H2 or something with so much neutrons and electrons until morale improves and they become He? Or would that make radioactive He?
Well, as long as they can make electricity too cheap to meter, we can get helium from somewhere. Mine it from LNG sources currently untapped due to EROI < 1, or ship it from the goddamn Moon - ultimately, every problem in life (except that of human heart) can be solved with cheap energy.