As far as I know, Baptists don’t do what you’re saying. They just preach abstinence from alcohol for Christians.
To the point: it doesn’t say in the Bible that the wine was nonalcoholic.
As for why God tells us to be sober minded—it’s to protect against allowing your mind to be vulnerable to bad influences. This is good advice whether taken in a spiritual context or a secular one.
A party is not a philosophical gathering.
Some people have the enzymes to process alcohol rapidly, and some don’t. Those who don’t, get drunk fast and intensely - leading toward easy overconsumption and possibly a fear of anyone drinking at all. Those who do, wonder what the big deal is and can by choice avoid drunkenness while imbibing.