We would have often chased the same people. Prosecutors and detectives don't have the same job, but their overall goals are the same.

[ Admittedly, L picked and chose cases, whereas Light would have been a bit different. Still, it would have been much more similar than the roles played by L and Kira. ]

Before, I would have agreed with you. How could you change something that big? The most we could do is slow it down a little until we were dead, and then it'd go back to normal. The power of the Death Note gave me the power to do more than that. I couldn't have predicted it, but it would take an idiot to pass up the chance. I was making a difference. I'll keep making a difference. The world will be safer when I'm finished.