RE: What's wrong with this POV?
WHat he's doing is touting ONLY the advantageous characteristics of the heavier arrow.....WITHOUT acknowledging the FACT that the same bow (at the same draw weight.....MY interpretation of "all things being equal"...) would propel the lighter arrow at greater speeds.
At some point there becomes a point of diminishing returns RE: the heavier arrow.
Of course the law he references is correct. But, is it misleading to the average hunter/reader.
I just stated that I think it is.