Note that this was changed about a year ago.
https://www.faa.gov/documentLibrary/media/Order/7930.2S_Chg_...
https://www.faa.gov/documentLibrary/media/Order/7930.2S_Chg_...
"These changes include modifying the acronym NOTAM from Notice to Airmen to the more applicable term Notice to Air Missions"
This is not explanatory, and sounds like more pandering.