It is certainly true that violence is rarely lacking in PG action movies.
There are plenty of guns, plenty of fights, and potentially as much death as a similar rated-R title.
This is done intentionally so as not to subject younger viewers to images that they may not be ready for, but James Mangold’s point to The Credits is a valid one, that doing this could have the consequences by making the violence seem to be not as bad as it actually is.
However, for the PG film, there is little to no blood, death often happens off screen, and we never see the pain that these people feel as a result of the violence they have been through.