It is simply a lack of strong leadership by someone who has political power.
That is certainly a factor. But there's a huge difference between New Jersey and the other states that
@The Wick cited:
New York: 54,000 square miles
Pennsylvania: 46,000 square miles
Virginia: 42,000 square miles
West Virginia: 24,000 square miles
New Jersey: 9,000 square miles
I'm not taking a side in the debate, but it's not surprising that these larger states have different policies. New Jersey has about 9 million residents compared to about 13 million in Pennsylvania. So PA is five times the size of NJ, but their population is only about 1.4 times NJ.
My only point is that we live in a tiny, over-populated state which makes it difficult to compare with our much larger neighbors. MA, NH and VT are about the same size as NJ, perhaps they would be a better comparison?