You’ve seen it before: someone uses a pluralized acronym to represent a plural concept. Here is an example:
Points of view = POVs
But why the ‘s’ at the end of the acronym? Point of view and points of view are both represented by the same acronym — POV. The pluralization of it is not necessary, even when the structure of the sentence is altered.
My POV is linear. Their POV are diverse.
WEAPONS OF MASS DESTRUCTION = WMD (not WMDs)
The group of weapons has traditionally been represented by an acronym that is not pluralized. This is the grammar convention.