Theodicies

[Laird]

But is there a possible world in which all the greatly conflicting design requirements for the tank, and also all the physical reality design requirements for human life and fulfillment, are both met?

Yes, I think there is. It's potentially even this one: as I mentioned earlier, if nuts-and-bolts UFOs can instantaneously accelerate at unbelievable rates, then why couldn't a tank achieve 100mph over rough ground?

Consider also that the designers of our reality could overcome pretty much any limitation by stipulating more specific laws of physics that get around (override) it in a given situation, without even the need for divine/designer intervention.