Oddly, one person who was put off in frustration by the right/left reversed view had no problems with the inverted view on the ground glass of the 4x5 and loved the big camera. I suppose being reversed is ok as long as it's also inverted, making it still correct in a sense.
I agree, when the image is inverted the brain is immediately cued that things are not what they seem. When the image is merely reversed one must make a continuous effert to remember that the image is reversed. This reversal is particularly annoying when trying to track a subject moving from left to right and vice versa. One tends to first move the camera in the wrong direction. The problem goes away after a period of use but returns whenever there is a period of disuse.
A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.