Bullshit, is believing, or claiming fuel is energy.
Use of energy by reclaiming it from fuel ultimately comes at higher cost than any benefit that comes out of it, as we can see, in various forms of destruction, which accumulate over time, as we can see, all life now is threatened.
Sounds religious, but actually this is just simple Engineering observation, coupled with thirty or so years of experience Engineering Systems.
Thinking always in terms of profit seems to limit the intelligence of otherwise very intelligent people, to an extent that they even try to replicate what is given for free, the energy of the fusion reactor in the sky, that created all things, so that they can sell it, when all is taken logically into account.
Your impassioned defence of the illogical just shows you've been duped, most likely blinded by profit.
My question still stands, which mathematical theory predicts energy gain from fusion without the gravity of the sun?