Don't you think Noah might have erred by drinking to excess? Maybe it was his first experience with alcohol.
the idea that this guy planted a vineyard and made wine without having any previous experience with it is really silly to me.
i think, to the contrary, the fact this is recorded is strong evidence that he had quite a lot of experience keeping vineyards, making wine & enjoying it. he did this on purpose - from growing the grapes to processing them and drawing the wine, and it's pretty unlikely he did so 'accidentally' not knowing what it was he was laboring at. this was a process that took a significant amount of time, to start from scratch as he did. it took know-how and determined labor.
so, the fact that he did this isn't 'proof' that he had been doing this before the flood, on its own, but as a matter of evidence it is an argument 'for' the fact he'd made & drank wine before the flood, not evidence 'against' -- and this is the time period when there can be no doubt cast on the fact that he is righteous, blameless & walking with God.