With her return to the wizarding world, J.K. Rowling introduced new characters and a few new magical terms to the Harry Potter universe, one of which is the Obscurus; a magical being produced by a young witch or wizard who can’t control their powers.
Apparently, this has led fans to ask J.K. Rowling why Harry Potter himself wasn’t one.
But according to what Rowling recently published on her website, there are crucial differences in Harry’s situation and Credence’s, which explain why Harry never produced an Obscurus…
One of the big reveals of the film was that Credence, a repressed young wizard, was an Obscurial.