I think they have this bit a little backward. And displaying ignorance.Supporters of Milley’s plan point out that they could easily get permission to stock up on hollow points instead of the default civilian round.
I don't know of any civilians, LE or private citizen, using FMJ for serious social purposes outside jurisdictions that ban their citizens from using effective ammo (NJ IIRC?)
And while I know there have been "findings" that allow the use of HPs for police functions and for accuracy under international treaties, I believe the default military bullet profile is still FMJ.