bandit,
As was mentioned already this is a board that primarily caters to people with problem pouches. The stories about people taking humira and prednisone are about people who are in a very distinctive minority. I have had pouchitis for 18 years, but I have never taken humira or prednisone. Humira and other biologics are generally thought to be a "last line of defense" against pouchitis. So even within the pool of people with problem pouches, those treating with humira and prednisone are in a minority. It should be noted that Entocort is the preferred treatment over Prednisone and is a milder version of the same drug which is actually designed more specifically for gastrointestinal use than is Prednisone, which is a garden variety immunosuppressant steroid drug that has many applications and generally worse side effects than Entocort.
I am taking some meds for the pouch and controlling the pouchitis. However life is much better than when I had UC. The UC I had could not be controlled with the meds, whereas my pouchitis can be controlled with meds. The main thing I have back is my continence and I am pain free. I can go to the bathroom when I want and do not have to run to get there.
You are correct: surgery removes ulcerative colitis. It does not remove the underlying autoimmune disorder that caused the UC, and may cause other problems in the future (including pouchitis, which is a different disease and different manifestation of IBD). How it will manifest in your body in the future is unknown. From what you have posted your immediate concern has to be your colon and its current status, and whether it will stay in one piece until the time when you make up your mind about surgery. That is what your concern should be. When was your last scope?
Worry about the present and treat actual problems before potential ones. The autoimmune disorder cannot be taken out of your body and there is no way to know how it will manifest in the future, so do not worry about that which you cannot control. It's also possible that you have surgery and you end up with an excellent result and do not see any other manifestation of autoimmune disorder. But if you get sicker because the meds cannot control your UC, your chances for a good surgical result will go down and the surgery will also be much tougher on your body.