>The reason for this is because I'm not hiring for the craft of software engineering, which your perspective aligns with, I'm hiring to achieve business objectives quickly, efficiently and to a high standard. Not realizing that most hiring businesses are optimizing for the latter and not the former is what trips a lot of career software engineers up. You see yourself as a craftsperson, the employer sees you as a resource to achieve their business objectives.

You put it in an interesting way. But FAANGs and big tech are businesses, too. They would want to achieve their business objectives, too. Still they hire someone who is not proficient in a particular language / framework if he is a good developer. Maybe the time it takes for them new hire to ramp up is worth.