USGE protocols for colonscopy in UC are (or, were -- I haven't looked in awhile):
-- diagnosis
-- cancer surveillance every 1-2 years after 8-10 years of disease activity.
-- major change in treatment (rendered moot, I'd say, by medical literature that has fairly standardized treatment courses).
These protocols specifically contraindicate using colonoscopy to visualize the disease: Less is more; treat the symptoms.
Furthermore, there's ample medical evidence that disease activity doesn't correlate to severity of symptoms.
Doctors can be clinicians or technicians. I'd avoid the technicians.