I have a bush of pink blueberries, and I greatly prefer them to the "blue" ones I've also planted. It's a novelty for guests and a nice seasonal treat. Minmaxing the nutritional content of every bit of fruit doesn't seem like a fun way to live.
I suspect people like the pink blueberries because they have a higher sugar content.
Living out your final years with 'beetus doesn't seem like a fun way to live.