drum programming

I’m a total newbie and I’m wondering about drum programming. I am using Addictive Drums 2 for my drum sounds in Cubase 6.5.

This tutorial shows us how to set up separate channels in the Cubase mixer so we can manipualate the tracks with the effects in Cubase AND record audio (https://www.youtube.com/watch?v=Uw4Z5EVXtIc) . Why wouldn’t I want to just set up separate channels as in this tutorial (https://www.youtube.com/watch?v=dy9ovAd4rUA), recored two channel stereo MIDI and just control volume and effects in the Addicitve Drums mixer instead if I’m satisfied with the effects in their program?