Since tires are covered (at least by Ford) that makes the deal a more compelling prospect. May as well prepay to enjoy some spirited driving.
Frankly, though, the fact that worn out tires are in the first place an excess wear charge seems wrong, at least as a categorical rule.
Whether the tires wear out is a function of (a) the tire wear rating and (b) the mileage allotment under the lease. If tires with an anticipated lifespan of, say, 40k, are returned at the end of, say, a 40k lease, why do I have to pay for excess wear if the tires are completely worn out? I did not consume anything more than what I paid for (40k of driving). If the tires should have lasted 100k, the analysis obviously changes. But it should be reasonably clear that you shouldn't really treat this as a standard lease term.