The stance shown is not typical of navicular (as already noted).
Actually that stance IS typical of severe navicular disease. Horses with navicular bone lesions on the flexor surface of the bone will typically stand that way to relieve the tension in the deep flexor tendon where it wraps around the bone, over the lesions . Gene Ovnicek and once drove into a barn were we were to see a horse we had never sen before that had been diagnosed with severe navicular diseas. We didn't know what kind of horse, what color it was or anything. In a row of about 20 paddocks, there was one horse standing just like that. I said "I bet that is our case" it was. Ypu can spot the, from a mile away every time.
Those are the ones who benefit greatly from a proper shoeing package, with wedges and enhanced breakover all around the foot . Amd wedges do NOT cause secondary issues IF the foot is correctly trimmed first to take off all under run heel. IF there is medicated packing under the pad to prevent thrush and , IF nd the toe / breakover is also treated correctly. In cases where wedge shoes or wedge pads caused other issues, I can guarantee one of those criteria was not met.