Sorry, but you are completely wrong that CD is confined to the small intestine. Here are just a couple of links.
http://www.ccfa.org/info/about/crohns
http://www.webmd.com/ibd-crohns-disease/crohns-disease/tc/crohns-disease-topic-overview
And I really do feel that a colectomy results in one being "done" with UC. It's not insulting nor disingenuous to me. And yes, it is an elective solution, IMO. If I get to the point where the meds aren't working, my quality of life is suffering (but not in danger), then I know I'd find surgeons willing to perform a colectomy.