As I see it technical people don't want to do the mundane repetitive and boring tasks that a recruiter does. And introverted technical people, which many are, e

As I see it technical people don't want to do the mundane repetitive and boring tasks that a recruiter does. And introverted technical people, which many are, especially don't want to spend significant time socializing with random other people. You can try to automate the whole process, which various companies are doing, but keeping the spam out is difficult. And bad automation is also even worse to deal with than a human recruiter.