Earlier quoted context omitted.
The difference is those public parks get used. 44.0.0.0/8 is mostly empty.
Even so, we're left with less space than we had before. To my knowledge the FCC is pretty liberal with dishing out public RF spectrum ranges to private entities, but they're much more conservative with turning over private RF ranges to the public. Every part of the RF spectrum that the public loses is unlikely to be reclaimed. We have less airspace, permanently.
It should all be on 25 year leases, auctioned a few years in advance of expiry.