Regardless of all the other reasons, and there are MANY, there is one reason that has seared my memory.
There was much hype when the Taj Mahal was built in Atlantic City, and it was well warranted (at the time). This was a beautiful destination in Atlantic City where you could enjoy yourself or lose all your money. There were new jobs that residents were excited about, and they lined up trying to snag one.
Note Trump is quoted saying he wanted to make Atlantic City great again!