> because my prompts are in natural languages, and hence ambiguous.

Legalese developed specifically because natural language was too ambiguous. A similar level of specificity for prompting works wonders

One of the issues with specifying directions to the computer with code is that you are very narrowly describing how something can be done. But sometimes I don't always know the best 'how', I just know what I know. With natural language prompting the AI can tap into its training knowledge and come up with better ways of doing things. It still needs lots of steering (usually) but a lot of times you can end up with a superior result.