Interviewees are never representative of the people working in the field: you're selecting for the people who don't have a job (that they're satisfied with).
People with CS degrees who can't code are more likely to be out of work, or to be in low-paying jobs, and therefore more likely to be applying for jobs.
People with CS degrees who can't code are more likely to be out of work, or to be in low-paying jobs, and therefore more likely to be applying for jobs.