Ben Levi. Let’s say it IS assur, someone under 21 can always be yotze kiddush with someone above age. Same person can make kiddush on concord kal or other low alcohol wines. Your question is nothing more than excuse to “drink”.
Moreover, the largest shiur required for kiddush will not make you drunk – unless there is an opinion that holds the shiur is 1.5 liters. If one would get drunk on 8 ounces of normal wine, I suspect will be given a psak that he can be “maikel” and use grape juice.
Regarding the original question, all I can say is, despite the fact that medically I should not be drinking alcohol, and don’t, my simchas purim has never been compromised, and nobody has ever told me I was not yotze “purim”.