I completely do not follow you at all; with what you described.
Adding that additional constraint (fork brace) is going to help reduce any inherent ability of the front forks trying to arc (flex) from the intended line of travel within them. The top of each fork tube body is now supporting the other laterally; not just at the axle pinch bolts and the triple tree clamps. Overall; the ability of these two fork systems to flex as an arc is now lessened. And that results in decreased bushing and seal wear.