steering linkages generally fail because people run into things and that little bar up front isn't going to stop a whole Jeep. if the steering bends, then knuckles are saved from damage. if the steering doesn't bend, well... something has to give.
when I was researching my Uncles XJ build, I found a company that makes aluminum bars that can bend but snap back to position. several more companies have stepped up since then. here's an example of that: