I strongly disagree. Luke may not be a lawyer but he's proven that he's smart, and he definitely has a lot more emotional intelligence than Matt does.
Maybe he wouldn't be at home in Hell's Kitchen, just like Matt would definitely stumble about in Harlem, but muggers are still muggers. Also, he'd come home with significantly less injuries than Matt.
They have different talents but neither of them are completely incompetent and implying that is in my opinion a disservice to both characters.