If you're really willing to put your truck in a situation where it could roll over backward it seems like an effective piece of equipment to prevent that would be important no matter what it looks like. Rolling backward is harsh. Your interior won't look original after that. Or maybe it will but I guarantee the rest of the truck won't!
But my tinkerer brain says that maybe a small mechanical gate/stop that physically flips in the way of the column shift before it gets to "P" would be enough. Just flip it down when you're on a climb and bump it with the shifter if things get hairy. Leave it flipped up out of the way for 99% of it's life.
There are other reasons for performance shifters too though, like not overshifting other gears in other far more common situations.