“the four fundamental forces of nature - electromagnetism, strong and weak nuclear, and gravity - would all be seen to have descended from the same force.”
See, if the best they can do is to say that it “would all be seen to have” rather than show incontrovertible evidence then it’s no more truthful than a consensus that climate change and global warming are the direct result of human activity on earth...even if the math is seen as being correct.
I get it; you’re one of those people into practical things like learning to tie shoelaces and brushing your teeth, not cerebral stuff and definitely not theoretical physics.