I've dedicated so much time in reading about it too. Their is absolutely nothing bad or wrong in having alternative when it comes to market. The market price of one product can actually influence the price of another... I hope many people understand this!
Thanks for searching into the concept
Those of us in opposition to dual personality witnesses are not concerned with competing products.
We are concerned with our platform decision makers simultaneously charged with making decisions for this chain AND it's competitor.
I understand your point, it is a very complicated issue for the witness especially.