Reader seaofstarsrpg commented with a link to another interview with John Norman. It's here.
Apparently I was wrong to declare that the Gor series is a ripoff of the John Carter of Mars series but with bondage instead of adventures. John Norman (real name John Lange) says that "pretty clearly, the three major influences on my work are Homer, Freud, and Nietzsche. Interestingly, however obvious this influence might be, few, if any, critics, commentators, or such, have called attention to it." Presumably the critics haven't read Freud's influential work Masturbating to Frank Frazetta Paintings Is Too A Philosophy.
He's barely even heard of John Carter, despite what I, Wikipedia and the interviewer all say. "I can remember Tarzan books by Burroughs, but I do not think I knew about his various science-fiction works until many years later." Anyway, they're not that similar. In the John Carter series the title character travels to the primitive, low-gravity planet of Mars, whereas in the Gor books the main character has a completely different name. Edgar Rice Burroughs originally used the pen name 'Norman Bean'. 'John Norman' is a pen-name which...isn't completely the same.
He's a master-craftsman of language. Take this for example: "As the family legend has it, when my father's company slashed its employee list, he was the last fellow retained, namely, the cut-off started with the next fellow. For example, if there were one hundred on the list, and half were released, and we were counting up from the bottom, he would have been number fifty-one." Barely twice as long as it needs to be.
John, sometimes geniuses are misunderstood in their time, they are called stupid and deluded, and their ideas are dismissed. But this also happens to people who are stupid and deluded.