That's one way to look at it. Personally I don't think it's clear that the sleeve did nothing to prevent the axle tube from breaking. The only thing that is clear is that ultimately it did break. That 100 dollar sleeve might have gotten him an extra 100k miles or so out of that tube before it finally let loose. I'm not enough of an expert to say.
LOL!! The only thing that IS clear is that the axle STILL BROKE even with a product installed that was supposed to "strengthen" it. But hey, you can fantasize whatever virtues you want about it.