I am not at all sure that the indictment was in the public interest. One argument that is being made against it does not convince me at all, however: that no one other than Trump would be prosecuted under this set of facts.
The argument presupposes that there are other people out there similarly situated to Trump. How many other New Yorkers were elected president in 2016 because they managed to conceal a relationship with a porn star by concealing hush money payments?