I mean, I think it’s just reality-adjacent technobabble and you’ve got to accept it as plausible in universe. Tritium is a real thing used in nuclear fission but it’s not so rare that you should don robotic arms and go on a crime spree to get some. On a more Star Trek adjacent topic, protostars are a real thing but (at least as far as we know) you can’t shove them in a box to travel ludicrous speed.