Like I said elsewhere, the problems I pointed out are relatively mild in comparison to all the good from fusion energy. However, there's only approximately 25kg of tritium in the entire world. ITER is expected to use a majority of this world-wide supply. The mass manufacturing of tritium also presents another problem you pointed out with the supply: a super rare isotope needs rare earth metals to manufacture, one that is already in extremely high demand. I love this research and I want to succeed in any way possible. But we have to face reality and the material problems the science has to overcome.