Violating certain rules? IMO I don't think he is. Others may think so (as you indicated) and that is their opinion. You'd really have to read the book and/or watch his video series to understand more on his idea of "covering" to understand better. From what little I know about boxing, I can see the similarities you hinted at. A boxer will "cover up" a vulnerable space on one side of his body or head while the other hand while the other is attacking... in anticipation of his opponents' potentially better counter-punching skill/timing etc.
I do firmly believe that each WC/WT/VT person/lineage interprets & applies the theories in their own way. If it works for them in a given circumstance, good on them!