Or they simply aren't interested. They are happy with what they do.
On the other hand, seasoned programmers do make great interviewers. And a good interview often include them in the process. Their insights are very valuable.
Also as a sidenote, if there is no senior/lead developer during your interview process. Or the people do not appear to have a clue. Run. Unless they are going to hire your as the senior/lead, and they admit they lack the knowledge.