Especially because the transmitters disappeared, too. ALL the station equipment disappearing? Wonder who's got it now, or what it's been parted out to for other AM radio stations scraping together gear to keep running.
Smash and grabs of transmitter building equipment are relatively quick. They set off alarms (usually) of course, but you can get out in 15 minutes with a few racks of gear.
Taking down a tower requires more time and care. And tools. And it pays less for scrap, although the black market for the kind of equipment you find in a transmitter building is small and not well-capitalized.