I agree with this, and would add that it's hard in part because it's always been hard, and people have overcome. I can only imagine the difficulty of coming up with something like HTTP, or a suspension bridge, or algebra, without the mental scaffolding already being there. If you go back and read the original discussions of these, they include a ton of what seems like circuitous explanation for what we take for granted as "simple" ideas, but which are absolutely not simple at all if you have to pull them from the primordial void sight unseen.