I wouldn't even call it stupid in general. As I said, it works in specific situations, but you have to know when. It certainly doesn't work as a "universal solution" as they claim. Chain punches could be a useful counter to defend a forward rushing brawler as his center line is completely open, but you have to know when it's time to stop chain punching and switch to power punching as the time frame for effective chain punching is quite short.
I'll stick with the double jab in actual hand-to-hand combat.
Sig courtesy of that photo-matic magician limba
I went out the way that I fight. I went out on my shield. That’s it. Done. --Chuck Liddell
My goal is to end my opponent --Carlos Condit