No, that's wrong. Long after Kinsey, homosexuality was being described as an abnormal behavior. For example, when I took a course in abnormal psychology in the late 1960s, it was so described. The reason it ceased to be considered abnormal, is that studies showed that homosexuals were no more likely than heterosexuals to have abnormalities on various psychiatric inventories.
Stephen Gould once reported that while looking through entomology journals in the stacks of a library, he found a paper by Kinsey regarding some insect. Someone had written across the top of the article: "Why don't you write about something more interesting, Al?"
And no, it's not rocket science. It's more complicated than rocket science. I've got a degree in microbiology. I've done graduate work in immunology, and supervised an allergy/immunology clinic in the Air Force, after training with physicians who were immunologists.
And when I read the literature, I still have to look up terms and processes. Anything looks easy if you don't know anything about it. Paul is probably better prepared to talk about immunology than the average person. But I very much doubt that he knows as much as I do about it. It would be odd for an ophthalmologist to be that knowledgeable on the subject.