This lawsuit is the first attempt to test what happens when state abortion laws are at odds with each other. New York has a shield law that protects providers from out-of-state investigations and prosecutions, which has served as implicit permission for a network of doctors to mail abortion pills into states that have banned the procedure.
For the same reason that millions of dollars of police effort are spent to catch one person who kills a billionaire and relatively small sums are spent catching murderers of regular people.
There are two tiers of justice.