The problem isn't to get the right answer. When you have a recipe that works reliably for a known set of conditions, you're not doing science any more - you're doing technology.

The problem is to work out which questions to ask next. The different interpretations should eventually diverge into edge cases - of curvature, of observable other universe, or of some other difference - where they no longer predict identical results.

An incomplete theory suggests at least some further distinctions are possible. They may or may not be possible with current interpretations. They may need a completely fresh interpretation. But the distinctions matter, and it's important to consider the different directions they point in.