Refraining from a ‘detailed’ reconstruction seems quite reasonable. In history, you don’t generally have to explain how something happens to assert that it did.
Holland is indeed something of a pop author, but once you’ve translated Herodotus it’s hard to claim that you have no real expertise in history.
It does indeed. Evidence that x is true is not the same as an explanation of how x occurred. For instance, we can see that an ancient city was burned down around a certain year, but not know for what purpose or by whom.
You just complained that he wasn’t an academic.