There do seem to be stories out there (or maybe one story posted multiple times) about military doctors having a jar of foreskins in formaldehyde sitting on their desks. (Never been my experience, thankfully!
In my own experiences, I'm not sure if my doctors had "an obsession about cutting foreskin off" as it was a combination of two strands of non-critical, non-skeptical thinking: 1) if there's a problem with "A", it goes away if "A" goes away and 2) there's no reason to think ahead to the step after next.
"Doc, it hurts when I move my arm like this!" "Well, then don't move your arm like this!" There is a sort of brutal simplicity to answering a complaint about the foreskin with the recommendation to remove the foreskin - after all, if your foreskin is irritated, you wouldn't have the irritation without the foreskin. You don't even need to have a particularly dim view of the foreskin to see this view as internally consistent.
Looking back at my previous comment, I think I might have oversold my story. The doctors didn't look at me and immediately demand that I let them circumcise me; circumcision was offered up an elegant solution which would obviate the need for me to even worry about my foreskin again. I think the docs got snippy (ha!) when I didn't immediately acknowledge the superior logic of their comments, regardless of whether I was up for considering circumcision. And in the second case, I think some of the doc's annoyance might have been due to a complete lack of bedside manner. I was still recovering from an infection and the side effects of the antibiotics which killed off the infection, so I wasn't exactly firing on all cylinders. I've been told I can present as a bit of a "dumb jock" in those sorts of situations, and I probably lived up to that, since most of the small talk we made was sparked by us recognizing each other from the gym and how I found lifting to be a great stress reliever. I don't think he appreciated how a quiet, amiable, not-quite-all-there guy suddenly got real focused when he started talking about circumcision.