Bokeh is both a feature and a bug. I kinda figure if cameras never had bokeh we would never miss it.
In that case, we truly woulnd't miss it.
Depth of field is incredibly important for managing a viewers focus. Imagine a picture of a coffee in a coffeeshop with the background out of focus - you can clearly see a coffee cup. That same photo but with everything in focus will be much more confusing - what should I be looking at, it's too busy, etc.