It's an analogue drum machine, so he's almost certainly trying to get that 1980s drum machine sound, 808 hihats and things like that. A real drummer isn't going to help there.
In the more general case, reasons to go for a drum machine include: lack of space, lack of skill, inability to find a drummer willing to work for free, inability to pay for a session drummer, bedroom studio in an apartment (i.e. noise problems), the fact that the drum machine will give you a stereo pair, and the fact that you can go back and edit the drum track is often helpful.
But then, I'm one of those sequencer kiddies so I would say that ;-)
For more realistic drums, e.g. Korg Triton, I have been experimenting with fairly heavy compression and the results have been rather pleasing to me. However, I wouldn't do it for an 80s New Wave sound.