RV manufacturers could absolutely stop any propane refrig damage issues if they would only install them within a strong aluminum or steel gimbal framework -> as in an enlarged version of the drink holders used on boats.
Considering what replacement absorption RV refrigerators cost today, I'd gladly have spent $500 more for our RV when new to have it's refrig mounted this way. Just a little bit of movement within a restricted gimbal mechanism area would be all that's required to radically reduce off-level damage ... such that a vastly larger space in the RV would not be required just to allow some refrigerator box swinging movement in all directions to help compensate for a non-level RV.
It wouldn't be Rocket Science to incorporate this refrigerator mounting approach in RVs today ... after all, look what they're doing with multiple RV slides and RV decks!