I think the value of katas is vastly underrated in today's atmosphere.
I also think that who created those forms does not matter in terms of the usefulness of the forms. However, history ought to be right.
If Parker created them and taught them in the 50s, then he was farther ahead of his time than I thought.
If he learned them from someone and was teaching them in the 50s, then he was more openminded than I thought.
If he learned them from Woo in the 60s, as most tend to say, then he was even more openminded, and valued the quality of his system over his own ego.