Because they have over 15,000 confirmed cases and Ohio has a few hundred. Studies are showing that the best possible way to "contain" the spread is to identify carriers early and isolate them from the public. NY is doing their best to handle the situation. They are a major US import city. A total lockdown of state borders and traffic would put a huge dent in the spread, but that won't happen. It is in our best interest to let NY test as many people as possible, so long as they are making sure those testing positive are adequately quarantined.