It’s seemingly closer to $6b for that year, which is obviously a ton of money, but considering they employ north of 50,000 people, if each person costs them $75,000/yr that’s already $3.75b. NYC spends $2b on just their department of sanitation. It’s a city with like 8.5m people, everything costs crazy amounts of money.
https://council.nyc.gov/budget/wp-content/uploads/sites/54/2021/05/NYPD.pdf
https://council.nyc.gov/budget/wp-content/uploads/sites/54/2021/05/DSNY.pdf
It’s not about an honest belief that someone will identify as trans to commit a crime, it’s about the advantage of identifying as a victim in order to push an agenda.