Crappy wine is made from crappy grapes, or good grapes handled poorly, not fake grapes. There is no reason to use fake grapes because there is so much supply of

Crappy wine is made from crappy grapes, or good grapes handled poorly, not fake grapes. There is no reason to use fake grapes because there is so much supply of real grapes (see "wine lake"). And most wine is not meant to be aged for a long time so there is no reason to use a cork and risk cork taint.