… doesn’t seem relevant, since saying something doesn’t require you personally asking about it at all, second,
what they’re saying is fake guns for movies should use a caliber for which no bullets exist, solving the main part of the issue, i.e. the fact that someone can load a normal bullet in a gun that is to be used as a prop.
… answers your question, and that quote is most of the original comment, I could even have quoted the whole of it.