To be fair: there remains the possibility that harpoons can be countered easier in the listbuilding step, by countermeasures, b1 or expert handling, compared to the other dominating builds?
I don‘t dispute that harpoons partially caused a change in the meta. But there was enough elasticity available to adjust.
But by now I have to dispute that harpoons are too good for the game, because lists with harpoons are not better or worse than those without!