They couldn’t be bothered. Gov. Andrew Cuomo and Mayor Bill de Blasio blew off a solemn dedication ceremony Thursday for a memorial to those who died from toxic exposure to Ground Zero — and got blasted by first responders and their families. “They should have been here and it’s unacceptable that they’re not,” said Maureen Fritz, who attended the 10:30 a.m. event in honor of her brother, firefighter William Gormley, who died in 2016 of 9/11-related illness. “They ought to be ashamed of themselves — They should not be re-elected at all because that’s not how you treat your citizens,...