I think Nietzsche meant that either you are talking about objective known facts and there is no discussion, facts just are (or not); or, in the most common case, you are talking about subjective ideas, feelings, opinions, etc, and these are just other names for taste.

So both are right, we should not be discussing taste and we are deemed to only discuss about taste.

I'll let some other HNmate complement with a Steve Jobs quote, if they wish.