IMO, to be a good programmer, you need to have basic understanding of what a compiler does, what a build system does, what a normal processor does, what a SIMD process does, what your runtime's concurrency model does, what your runtime's garbage collector does and when, and more (what your deployment orchestrator does, how your development environment differ from the production...).

You don't need to have any understanding on how it works in any detail or how to build such a system yourself, but you need to know the basics.