Comment by jjulius

I don't see that comparison at all. Rather, I see an idea that's more akin to, "This is the sum testament to our overall technological capabilities at that time", for both YT and the Great Wall.

That's why I question whether it's actually a "miracle". I don't mean to suggest that it's not quite the feat to make something like that exist, but I see it as more of a representation of where we're at technologically, rather than some sort of improbable, inexplicable thing that otherwise shouldn't be. The fact that the response to my post seems to clearly understand how it exists kinda-sorta supports that, IMO - you can draw a clear path towards understanding how it came to be.