Mostly because I'm pissed at Autolumination. If I did get a set of HIDs (no matter how cheap) I would have to get LEDs to match, which means I'd have to re-buy LEDs from somewhere. Even if I did bend over and order another set from them, I'm not sure whether the LED protectors have to be spliced into the wire, or if they plug in to the factory wiring. I'm not the most electrically/mechanically inclined guy, and that sounds like a lot of work.
All that said I agree with you that buying Silverstars doesn't make sense if I ever intend to go with HIDs. But if I'm going to hold off on those at all, the fog bulbs posted above are a good interim solution for wimpy OEM fog lights.