He might need them in the future, likely so.
But requesting them now when they are in short supply is like buying six months worth of toilet paper. It’s hoarding to the disadvantage of other localities with surge needs. Like, say, New Orleans.
Or, even passing a 2 Trillion dollar when all the was needed was a 1/2 Trillion or less.
This.
Governor Cuomo wanted to get immediate possession and control of the entire national stockpile for the benefit of his state - at the risk of all other states.
President Trump rightfully sent NY some ventilators but kept most of them under federal control so there would be some availability for other states when needed.