It falls into a broader type of tech hype based in the idea that if it would be good for something to work a certain way then if we can make it work at all it will obviously work in that optimal way. Like, it would be cool if we could get exponential growth in our rockets somehow (Maybe they reproduce? Do the rockets fuck, Elon?) so therefore assuming we can get rockets at all we can definitely make them scale like that.
Call it the Milliways argument. Because if you've already done five thousand impossible things before breakfast, why not cap it off with lunch at the restaurant at the end of the universe?