Heh, I can't argue against that. Of course, I'm no IT professional so what do I know. You mentioned Keep It Simple Stupid. I remember one of my high school teachers said that. I think it was a chemistry teacher that said that. It wasn't about computers though but I guess the same principle applies.
So, I'm guessing there are tutorials on how to make the most use out of Windows firewall. However, I don't see any recommendations to use Windows firewall except on Microsoft's website. Just something I observed.