In response to those companies, hiring managers, interviewers who keep asking the same question:
Where can I find great developers?
A developer becomes a “great developer” when the company, team, resources, projects, recognition, etc., are compatible with that person. Under that logic, I believe any programmer can be great if they desire to do so and find the environment and motivation to thrive.
Most technical interviews fail to find the right people because interviewers and hiring managers usually go at it with an “idea” of what a “great developer” looks like to them. In most cases, everyone ends up hiring people who don’t work out and miss out on people who could have become the “great developers” there were looking for in the first place.