I think my proctitis was pretty severe and oral medications helped me quickly. Before oral meds, I was losing a lot blood with every BM, constant D and running to the toilet 15+ times a day. I couldn't leave my house because I was scared of having an accident. When my proctitis was mild, I didn't have urgency and dealt with only a little bit of blood loss. Proctitis can be debilitating, even if it's fairly mild. I think it effects everyone differently. I hope you're right and mine was fairly mild but my symptoms seemed very severe.
Maybe you need to try a different oral med? How do you know the UC is under control? Have you had a colonoscopy since beginning treatment?