None of us are even aware of the 'blind spot' because our remarkable brains fill in the blank.
I have come to believe evolution is a tool of the creator. The real unanswerable question is: Where and when did life begin? I do not believe life originated on earth.
After listening to the current dribbling idiots in D.C. for the past year, I am beginning to see your point.
It seems that because of the weird "wiring" aspect, the brain has to instantly and continuously fill in all the incoming visual stimuli: extending lines of perspective, remembering and "coloring in" details lost in the "blind spot," -- in short, every experience of vision is also an act of dynamic, rapid reconstructive interpretation. It's a brain workout.
So it seems the Intelligent Designer introduced an optical "glitch" that isn't a glitch at all: it is an ingeniously engineered system that multiplies the capacity for dynamic neural activity. Or, if you prefer, blind witless evolution did this, just ludicrously stumble-bumbling into both sight and mind. :o)
If life did not originate on earth then you are just moving the issue of creation to a different location...also with out any proof. Since the creation of life really is not a scientific question but a historical question I prefer to go with the eye witness account...read Genesis for more info.
God bless