I think this analogy to assembly is flawed.

Compilers predictably transform one kind of programming language code to CPU (or VM) instructions. Transpilers predictably transform one kind of programming language to another.

We introduced various instruction architectures, compiler flags, reproducible builds, checksums exactly to make sure that whatever build artifact that's produced is super predictable and dependable.

That reproducibility is how we can trust our software and that's why we don't need to care about assembly (or JVM etc.) specifics 99% of the time. (Heck, I'm not familiar with most of it.)

Same goes for libraries and frameworks. We can trust their abstractions because someone put years or decades into developing, testing and maintaining them and the community has audited them if they are open-source.

It takes a whole lot of hand-waving to traverse from this point to LLMs - which are stochastic by nature - transforming natural language instructions (even if you call it "specs", it's fundamentally still a text prompt!) to dependable code "that you don't need to read" i.e. a black box.