I do agree that we find it very easy to talk about “how” ahead of “why”. Especially those of us whose job it is to make the “what”.
I’d happily dig into whether a “how” does indeed fall out of a “why”. My knee-jerk reaction was “probably not”, but on A bit of reflection you may be right in more cases than not. The “why” helps frame customer/user expectation, which in turn suggests tolerances for usability, functionality and quality, which in turn should suggest a “how”.