Essentially, yes, but it's not my place to tell you or anyone which flavour you should have picked. I believe you are in the best position to determine what you should pick, but there's a big difference between "best" and "perfect."
As for "what way" in which it might be wrong, I do not know. I don't think I understand the question.
As for triviality, perhaps you're right. Maybe your choice of ice cream flavour will have cascading consequences that end up causing WW3 or something. We can't really know for sure.
If I were to accept that the value of ice cream flavours is subjective, then I would have to somehow conceptually make ice cream flavour distinct from other things people can value (that aren't subjective). I don't think that sort of conceptualization exists, and I haven't been able to generate one.