If the LCD didn't flip out it would be stronger. It could still get mashed but the hinge mechanism wouldn't be there to be damaged.
A major advantage for a flip out screen is low angle and Hail Marry shots. With the Nikon F photographers would take off the prims and shoot with the camera over their heads.
I think pro who must carry two cameras with two different lenses have to accept the risk. Taking the flip out LCD would be a major imposition for many, many photographers. Removing the LCD entirely would be a huge deal breaker for a majority of potential buyers.
Now what about a reversible LCD monitor that was strong on the back side? Maybe yes, maybe no.
Dave