Can you imagine?
"Ze feelthy Americains are not drinking enough wine, oui? Zen I say we throw a fit! We stamp our feet, we gnash our teeth, we wear our berets at a tilt, we stub our Gauloises out on ze sidewalk! A bas la lanterne, putains! How you like zem apples, eh?"
That's basically my view: Pitch a fit because (at least primarily because) your wine isn't sufficiently popular with buyers to justify your economic existence.
Look. If I ran, say, a muffler shop, and people didn't buy my mufflers, I'd go find something else to do. I wouldn't riot and demand that other muffler shops raise their prices (and cut supplies of mufflers) so that I could survive artificially.
"And zen just to reeealy show zem, we don't take a bath for weeks so we steenk real good and offend their sensitive American noses!
Oh wait...we do zat already, anyway..."