High-level programming languages use well-defined, limited syntax to encode program behavior in a deterministic way. Compilers translate these directions into programs that should have identical behavior between compiler runs and between different compilers. (If they don't, that's a compiler bug, or else an artifact of UB.) This means you can structurally and provably rely on the high-level programming layer without worrying about what's underneath: the assembly is abstracted away. You also get the massive benefit of being able to tweak and improve the assembly layer independently of the programming language layer, so long as the contract between language and compiler is not violated.

If AI is a "layer of abstraction," so is working with a bunch of contractors to make your app. The definition is broadened to the point of absurdity. (Solely: "I don't have to think about code anymore," which only touches on the most superficial aspect of an abstraction.)