Could be either. Nevertheless, while tone is tricky in text, the writer is responsible for relieving ambiguity.
It's also natural language though, one can find however much ambiguity in there as they can inject. It hasn't for a single moment come across as pretentious to me for example.
Think of all the tiresome Twitter discussions that went like "I like bagels -> oh, so you hate croissants?".
eliminating ambiguity is impossible. the reader should work to find the strongest interpretation of the writer's words