On the contrary, knowledge of aesthetic standards is something that is sorely lacking these days. Thousands of very thoughtful, very intelligent people have spent time thinking about things like the proper way to drink tea.
Perhaps instead of brushing them away with a middlebrow dismissal, open your mind a little to the possibility that the world is more complex than you think it is.
Edit: to add to that, for anyone that is curious. There is a pretty rich history in writing on tea, especially in China and Japan. Food aesthetics is also becoming a bigger subfield in philosophy too, usually categorized under everyday aesthetics.
https://en.m.wikipedia.org/wiki/The_Book_of_Tea
https://en.m.wikipedia.org/wiki/Japanese_tea_ceremony