He assumes that the reason that we who know how to write software don't (generalism) do his job is because we're "blind to those opportunities."
He sees himself as the architect and software developers as the grunts who lay the bricks.
A building architect can design and make a blueprint based on knowing the qualities of various materials and a final outcome/design. That design isn't likely to change [much] after it is approved, unless the architect omitted something (or screwed up) or there are material issues.
Most ideas presented to 'coders' are half-baked. "I have this awesome idea! Let's build a building! With four bedrooms that will sleep a family!" "That's quite the well thought out blueprint there! Where do I start building?!"
Does that make it justifiable to respond with insults?
Also no where in the article did it say or imply that "those who know how to write software don't (generalism) do his job is because we're "blind to those opportunities.""
You obviously didn't read the article before writing this comment