From the Daily News:
In 2007, the agency issued 410 hours of permits for Highland Park's existing ballfields. That jumped to 753 hours last year, but included a two-week carnival that accounted for 195 hours.
Parks spokeswoman Patricia Bertuccio said the permit lists don't account for countless pickup games and practices on those fields that don't require prior approval from the agency.
The Parks Department's website displays this:
So, they are going to tear down a ready-made nature preserve to build ballfields for practices that are not supposed to be held on ballfields because there are too many people who want to play games on them, yet there was a documented lack of people playing games on the fields for the past few years. In Adrian's world, this makes sense.