Without getting involved in the discussion, I just want to explain why CY milk costs so much. Most dairy farms utilize co-ops, i.e. a bunch of small farmers milking their own cows and selling the milk to the bottling, etc. company. This is much cheaper than having it all at one farm since the overhead is much less and they don’t have to pay workers. CY milk, however, must be watched, and having a bunch of different farmers do that is ridiculous. So they have one huge farm with one mashgiach, but that requires much more land, much more workers, etc. so it costs much more overhead.
Hope this explains something.