I didn't do this all at once but have a few thoughts. Before my UC got so bad I had just my uterus removed but my ovaries were retained as I was 40 and they retained my ovaries in order to not throw me into early menopause. At that time they said at around 45 was when they recommended taking the ovaries at the same time. The feeling was that was close enough to menopause and the potential for future ovarian cancer outweighed the need to keep them. That was over 20 years ago.
I elected to have my ovaries removed when my colon was removed, I was almost 55. They were no longer working - through blood testing. They ended up being in pretty bad shape with cysts - but that was only apparent when they opened me up.
If you don't have gynecological problems now I see your apprehension.
My j-pouch failed and it was removed 2 yrs ago and my surgeon had to deal with hours of adhesion lysing. I had 2 surgeries. First to be diverted to a permanent ileo. She spent 3 hours lysing adhesions during this lapro procedure. During the j-pouch removal, 6 months later, she spent 5 hours lysing adhesions. The removal surgery has to be done open. My adhesions were from the open hysterectomy and open colonectomy surgeries and were the source of a great deal of pain.
I don't know if you've had open abdominal surgeries in the past but you can see how they can be the source of painful adhesions. You have a lot to consider. I can see it from the surgeon's perspective as there will be scarring affecting any future surgeries. I see why you don't want to have it all removed.