The reason ten times programmers don't exist, as programming is hardly ever just about spitting out lines of code. More often than not you have to spend time clarifying fuzzy requirements, getting cross team alignment on requirements or spend significant time on getting your code peee reviewed and build on less than efficient CI/CD systems.
The myth of the ten times engineers is propagated by management. Senior management love to claim they hire the top 5% of the market, something that is statistically impossible.