Canonists are members of the Church. Their mission is to research and teach the application of canon law, it is a mission sanctioned by the Church. Unless there is a document of higher authority or evidence to the contrary, we can conclude that this commentary represents a common understanding on how the passages of canon law are applied in practice. At least, this trumps any private interpretation.
Canon 916 does not say it applies only in “danger of death”. If this is what the lawgiver would have meant, this is what would have been written. “Grave situations” is an open category, it allows for various circumstances, for example, pastoral needs, according to interpretation.
You are still confused that I am proposing receiving the Eucharist in the state of mortal sin. This is not the case.
