Modern cosmology went off the rails when it abandoned classical physics, in favor of pure mathematics. Their current working models of the universe are a dismal failure, as they do not predict or adequately explain observed phenomena.
When the models fail, they don't apply the scientific method to discover why. They merely invent ever weirder goblins to patch over the shortcomings of their basic theories.
The theory simply CAN'T be wrong, so reality must be something different than what we plainly see.
I know. But if ordinary matter and energy are basically one and the same, it makes sense that the other two might also be. And they are attempting here to somehow connect these other two.