Thinking of this, we have to say Hoffman was one of the earliest to have such business adventures. I think that's quite admirable.
I agree completely. He was definitely one of the pioneers in ensuring the export of the highest quality Chinese teas to Western consumers which, as the film shows, is not an easy task.
I still don't get the perspective that Hoffman is "telling native Chinese how they are doing things wrong". He's not telling them anything that they don't already know--that overburdening the land and using excessive chemical fertilizers makes for inferior tea. It's mentioned in the film that many of the farmers utilizing such practices usually have a section of their farm where they produce their own teas and produce that is completely organic and sustainable, because they know it creates the best product. It's simply that the Chinese government favors quantity over quality for export purposes, so it's in the farmers' best interests to make large yields of inferior product (at least at the time the film was made; growing interest in quality tea in the West seems to be changing this slightly).
Sorry, but again, watch the film before you critique it. To condemn Hoffman or the film based on a crappy two minute trailer is pretty ridiculous. If you want to check out the film, you can download it from www.surrealmoviez.info
(register, then search for "All In this Tea").