Do you ask the same of other sciences--do you demand that the scientists studying gravity explain where mass came from? Or that astronomers explain where hydrogen came from before you accept their silly theories about how the sun works?
I do not accept TOE as a valid science. I look at it solely as a philosophy, which devotes itself to worship of man, and attempts to disprove God (which is denied, of course).
It is no different than a religion, as it stands. It requires blind faith in nothing, because that is the assumption at it's base, ie: Something came from nothing, started life from an accident, and advanced from a single cell through untold myriads of "transition phases" (which can't seem to be found, quite yet, but we're looking hard!) to become a man, and/or every other specie or single-celled organism still on earth.
TOE requires quite a leap of faith, since science is demonstrable (even in theory), and explains to us how mass and hydrogen can be measured. Science fiction tells us that life came from nothing, or that aliens (where did the aliens come from?) plopped some life onto earth, or whatever else the EVOs say they don't need to explain. Arthur Clarke, Robert Heinlin, etal were quite interesting in my youthful studies, but I figured out that not everything they posited was a truth.
You can't demonstrate your theory of evolution. You could admit you are auditing God's kingdom, and speculating natural causes (but, that would be so wrong, to one looking in God's face and spitting), since every smart person knows "there is no god, there is no god, there is no god...lalalalalalala..." and everybody else is just a dumb superstitious yokel.
The problem with your scenario, is that most of us aren't that dumb! Science is repeatable... or didn't you get the memo?