Although I absolutely get where you're coming from in your first sentence, I don't necessarily agree with the second one!
In my experience the consumers I work with are quite happy to try different cuts, from different species, specifically in order to compare and contrast. They will even quiz me as to why venison from different animals tastes different.
Of course the same might never be true for the general consumer, but overall I thik it is a much more complex market than we perhaps think at first glance.
General consumers buying from a butcher or other primary outlet, yes I agree, but catering trade customer are a different matter