The subfield of software development where artistry outweighs cleverness and productivity is game design -- and not all game studios exist to do things that way, just particular boutiques centered around one storyteller's vision.
Not sure if it's relevant? Google has hired Guido van Rossum and James Gosling. I'd imagine Google didn't ask them to "reverse a binary tree", whatever that means.
I.e., if you are Frank Gehry or Frida Kahlo, you don't need to go through hoops. (If you're reading this, you are probably not Frida Kahlo.)
If someone is aspiring to be her, you just helped crush that dream a little bit more. And for what?
It's just a fact that most people are not one of the very best in their field: 50% of people can't be in the top 1%. That's not to say people shouldn't try - after all, many of the "very best" tried very hard to get where they are.
I test all developers by paying them to make the equivalent of a bird box. If it comes back relatively well designed, cool, I've got a developer. If they come back with three designs for different environments and species, I know I have an engineer.
As it stands, we have kids who have zero real world experience at the helm of corporations and the results are easy to see. They rarely produce anything of value for the general population. So rare we have to call them unicorns.