You've mentioned that before and I think somewhere you've even posted a guide about how to do it correctly. To be honest, most of my exposure to failures is east coast and woods related where I've seen sensors get bonked, wires plucked, etc. But to your point, it's totally possible those failures would be avoidable if mounted correctly. My experience in rally conditions for the failure rate is so minor my opinion is pretty much irrelevant!
Regardless, the fast guys all seem to run multiple redundant systems. It just makes good sense when your finishing an event (and not getting stuck in the dark!) depends on it.