> Piecing together technology in novel ways to solve highly targeted problems is a skill

The LLM outputs this out of the box? Where's the skill?

I don't believe the comparison to car tuners benefits your thesis here. The spectrum of people I know who tune their cars varies from utter idiots to professional engineers. You cannot state as a fact that anyone who does it has insight or even natural talent. The bar is so low that anyone who has enough money can do it (just like coding with LLMs). In fact one can say that most people are incompetent, and by tuning their cars to varying degrees they endanger themselves and others, enlarge their running/maintenance costs, lower their car's resale value, and harm the environment.