Oh, man, you got me there. There sure isn't any variety in those categories. I mean, if you can tell a witbier from a biere de garde, or a flanders brown from a gueuze, you must have a super palate or something. Plus, there sure isn't any variety in 16E.
And never mind that nonexistant American Sour Ale category. Doesn't exist anywhere, there isn't a book on the topic coming out shortly, and even if they did exist, they'd all taste exactly like the ones in Belgium, which also all taste the same.
There aren't any IPAs, light lagers, fruit beers, stouts, barley wines, or anything else made in Belgium, either. No sir. Wouldn't go well with all the bananas they're adding to the wort.