No one is saying "draw a copy of something that already exists with near-pixel-perfect accuracy". When the parent comment said "emulate", they meant "create something of your own in a similar art style/genre".
I can bet you that if you try to "scribble a random mish mash of curves", it won't look and feel anywhere as great as that Picasso painting, and it will be extremely difficult to get anywhere even close to his level. And even if you show both yours and Picasso's paintings side-by-side to a person who has never seen a Picasso's painting before (and who doesn't even know who Picasso is), they will always pick the Picasso's painting as more artistically impressive.
this is also why art generally follows fashion rather than being truly avant-garde--artists need to pander to the wealthy/powerful (the church for many centuries, for example) to make a living, so trying to "emulate" popular art would first require a pandering/fashionable perspective, which is hard for an outsider to truly achieve without first becoming an (art) insider.