I mean it’s always going to be better if they’re not working against each other. For example, imagine you’re learning to walk the tightrope. A harness and a net is going to be safer than either one. The harness could fail, and the net could have a structural weakness, but there’s very little chance of both happening. Or for a more car relevant example, crumple zone plus airbags is gonna help more with head on collisions than just one. When the two systems are in conflict, though, you’re right.