Those other meetings you speak of would not have these aggravating conditions applied to them, so the penalties might conceivably be less.
You mentioned that these are different from other meetings. Continuing in a devil's advocate role here, consider a wedding. A wedding officiated by a minister would be covered under this and presumably someone who disrupts that wedding would be charged under this provision. What about a wedding officiated by a justice of the peace? Should that not also have the same kind of protection?