Many people are unaware of the proper way to adjust side mirrors for blind spots. It seems awkward, but it does work.
Sitting in the driver's seat, lean right until your head is centered in the interior, looking at the rear-view mirror. It will appear that your side mirrors are aimed at the car body. Adjust the side mirrors to point away from the car body until your blind spot is gone (yes, you need long arms to do this in that position, but you can adjust and come back to center to check). When sitting in the normal position, you s/b now able to see a vehicle in both your side & rear-view mirrors simultaneously, as it approaches from behind.
Personally, I think seeing around the pillar is a positional issue, something you have to be diligently aware of and get used to over time, as I did. I try viewing all front and side windows from a "panoramic viewpoint," if you can imagine that. Even with properly adjusted side mirrors, I extensively turn my head & body to look behind me to check blind spots.
I can NEVER completely trust mirrors. Last time I did that backing out of a parking space, I let up on the brake, rolled back a couple feet and the right rear corner of my bumper bonked the center/license plate area of a parked car, which then "magically appeared" in both side & rear-view mirrors. Cracked the right rear corner of my bumper cover & flexed it enough to pop a pin (under the right rear wheel well), separating it from my vehicle
(no damage to parked car). Even though I re-pinned it just fine, I had to live with a 2" crack on my bumper's corner (not like me to leave a vehicle unrepaired; didn't want the expense of a new bumper cover for an 11 year old vehicle I'd be getting rid of). Perhaps it the angle at which I was backing out? :?
Moral of the story, NEVER totally trust your mirrors, even under the best of circumstances; start training your neck to twist around (like in The Exorcist :shock: ) so you can see all your blind spots BEFORE making a move!