I agree with this, I don't think we'll be programming in natural languages until the computer is intelligent enough to pick out unintended ambiguity and ask clarifying questions. What I'm unsure about is whether or not the computer will be that intelligent in 50 years. Whenever it is that intelligent, I expect us to transition quickly.
There are going to be many tasks for which we don't want any independent judgement to be exercised by the machine. And for those tasks, we're going to still want a highly structured language.
So: yes, most companies already don't require people designing things to be able to fully spec every edge case in advance, without any dialogue.
Moreover, human communication is continuous and conversational. Programming is not. Most of existing code editors are not designed to have a conversation. Jupyter notebook is close but not there yet. I bet with a conversational agent style code editor plus a good auto suggestion and auto completion feature, we don't need to invent technology to use natural language to communicate with a machine. We just need a well designed formal language with precise and concise syntax.
Some people write news conforming to Google translation's performance just to make sure the story can be auto translated to many other languages. Most of these stories have pretty normalized vocabulary. This is how much human can adapt to the new world.
One day when the machine intelligence surpasses human intelligence, we will all speak in Python or whatever the most popular among machines.
In a sense, that's one definition of language power - to what extent can you specify that what without having to specify the how, assuming that the machine can execute the how much more optimally than you can most or all of the time.
I'm not sure what you mean by the outcome, but you can absolutely over-specify the output you want, and it's a relatively common problem. For example, you could say 'I want a system that prints lines with a saffron-based pigment', when all you wanted was an intense yellow-ish color, and don't care about the exact pigment being used. Or, you could say 'I want a program that let's a user choose red or blue or yellow and then paints a line in that color', when you actually mean the user can choose any color.
I've seen many problems of over-specification when talking high-level details with less technical people. They tend to give details to help explain what they mean, without caring about the specific details; or they use metonimy expecting everyone understands what they mean.
Whenever precision is required, we end up with methodologies like technical writing, or specialized language like legalese, to provide the necessary precision.
If we didn't have "programming languages", we'd end up with some sort of "computerese" analogous to legalese, and it would still take years to become proficient in using it, and there would still be either people or AI who would translate natural language into "computerese" (but we'd likely prefer human oversight over the AI anyway, given that a human that needs an AI to convert their language into something more precise is likely not capable of judging whether the output is precisely what they meant).