The "Lessons Learned" episode also dealt with a somewhat political theme. Nevertheless, I'm in agreement with you that I find these stories to be compelling and relevant. I like it when shows tackle issues of 'moral and cultural significance.' Three of the best episodes this season have been ones addressing such issues:
Lessons Learned - prisoner interrogation/torture
Profiler Profiled - sexual abuse
Distress - post traumatic stress disorder
They've never dealt with these in a heavyhanded way though. Rather, the writers have been quite sensitive to the complexities of the issues.