His statement was that it was determined that it would be too easy to change settings when you did not want to.
I guess that scenario could happen if you had the LCD on (i.e. in menu mode) and brought the camera to your eye (though that does seem a mildly unusual way to use the camera).
Solutions would be:
1. Have a menu option to turn off the touchscreen if it bugs you
2. Have a proximity sensor to disable touch if the camera thinks you've put the viewfinder to your eye (OK, this needs hardware, but I believe such sensors have been used in cameras before)
3. Put a strip of electrical insulation tape on your nose