What Denton has done is invent the idea that the vertebrate forelimb is somehow required by the laws of physics, and then claims evolution is in crisis because of something he made up and has no support for. It’s not so much that he doesn’t understand it so much as inventing made up reasons to reject the theory.
There are other structures we could look at. For example, if mammals have tidal lungs because the laws of physics demands it, then why do birds have flow through lungs? Are birds violating the laws of physics? If the laws of physics demands that birds have feathers, then why don’t bats have feathers? If physics demands that the middle ear has three bones and the lower jaw has one bone as is found in mammals, then why do reptiles have a single middle ear bone and three lower jaw bones?
We haven’t even arrived at the genetic evidence for common ancestry which is an order of magnitude greater than that found at the morphological level.