I'm trying to use analogies to show you the problem with what you're saying. You think that the term "blitz" has some sort of fluid meaning when it doesn't. You think that the term "blitz" has changed in meaning over the years, when it hasn't. You think that some people have been taught other meanings for the word and to some people, it might mean something different, when it doesn't and they haven't. An A minor chord is an A minor chord, left is left, and a blitz is a blitz.
It's not overused. It's used to describe something that actually happens and happens a lot.
A long time ago, I had just started posting on a weight training newsgroup. I was wanting to learn more about weight training (and that's were the Pencil Neck name comes from.) A guy made a comment that Creatine makes you retain water in your cells and is a salt (because salt makes you retain water.) A couple of posters came down on this guy like a ton of bricks and I defended him because it seemed to me that they were being way too harsh. I didn't (and don't) know much about the chemical composition of Creatine and argued that it COULD be a salt (I just didn't know for sure.) And those guys came down on me really hard. And we argued for a bit. I didn't know who these guys were. Well, it turned out I was arguing with two of the best supplement chemists in the business who knew EXACTLY what the chemical composition of Creatine is and that it's NOT a salt. I was wrong.
Right now, you're in the same basic position I was in back then. You're defending Andre on the basis that maybe he was taught something different and that maybe different people use the term to mean different things and that Andre was just as right as anyone else. That's wrong. There's not a lot of give about what a blitz is or is not. It's very odd that Andre would have this definition wrong but no one's perfect. If someone taught him this, then they taught him wrong.
It's like arguing over what an A minor chord is. There's one right answer and then everything else.