Thank you for your question.
I don't know the answer to that question either. You have a bunch of answers, and they all sound like they could make sense.
Just to reiterate, there are consumer preferences involved here as well. The Europeans know what kind of beef they like and don't like and the production methods they like and don't like. This has very much to do with consumer preferences more than with Canadian negotiating strategy and tactics.
Power is also at play here. We're a much smaller country than the EU.