The way I see it, if real breweries can make, store, and age real bear using real metal/aluminum fermentors and other vessels, then it can't be that much different to bottle/can into a vessel of similar metal-icular makeup.
You may not like Corona specifically, but it's every bit as much of a beer as most of what we drink around here. Taste is relative to the taster....unless we're talkign about PBR, in which case the taster is only claiming fondness due to pressure from their peers. Nobody actually likes PBR.