Mmm, bottle fermentation.
But I think the main point is more along the lines of expectations for alcohol and general tastes: I find overly sweet stuff a turn-off, and generally need to temper sweet stuff with something sour or bitter.
Also, mixing juice and alcohol can very often result in what a lot of us drank as teenagers, and may have rather negative associations to. Like I don't have problems with gimlets and micheladas or radlers, but I think I prefer them all on the boozier side, and stuff like rum & coke is just … not for me.
So if I go to a restaurant and get what I interpret as more or less teenager drinking swill full of artificial flavouring, Black Tower and general goon sack swill, I'm going to have a bad time, and be left wondering if this stuff is actually representative of what they consider alcohol for adults, or if the people at the restaurant are being weird.