Well, we need to get rid of the entire "Kolsch" designation too, while we're at it. Even if it's slow cooled in a coolship, spontaneously fermented, 30% unmalted wheat, turbid mashed, aged hops, and barrel aged, if it's not from the right part of Belgium it's still not a Lambic.
In commercial terms, I agree with you entirely. The same way I don't think commercial brewers outside of Cologne should be able to market their beer as Kolsch. I don't know if I've seen an American "Lambic" but I know I've seen plenty of American "Kolsch" brews.
But as far as homebrew, that's the beer I'm going for, and that's what I'll call it.