Teaching someone endoscopy is EXPENSIVE in lost procedure time and potential complications:
The time and financial impact of training fellows in endoscopy. CORI Research Project. Clinical Outcomes Research Initiative. - PubMed - NCBI
RESULTS:
Teaching fellows endoscopy added 2-5 min for EGD, with or without biopsy, and 3-16 min for colonoscopy, with or without biopsy. Calculating the number of procedures/h of endoscopy, the reimbursement loss resulting from using fellows-in-training in a university setting would be half a procedure/h. In Veterans Administration hospitals, training of fellows would lose a full procedure/h. In a model of 1000 procedures each of EGD, EGD with biopsy, colonoscopy, and colonoscopy with biopsy, the reimbursement difference between private practice physicians or academic attending physicians and procedures involving fellows-in-training would be $500,000 to $1,000,000/yr.
CONCLUSIONS:
Fellow involvement prolonged procedure time by 10-37%. Thus, per-hour reimbursement is reduced at teaching institutions, causing financial strain related to these time commitments.
Who is going to teach these "endoscopy techs" to do these procedures? You could teach an auto mechanic how to do an appendectomy if you really wanted to, but whats the point? You could teach a tattoo artist how to do a great heart cath I'm sure, but why would you?
It also is not just the act of getting the colonoscopy done and checking a box, it is performing a high quality exam with a provider with a high adenoma detection rate.
Anyway, it is a silly argument, and disappointing to see another physician not see the value a colleague provides to their patients. There are general surgeons out there doing a day or two of endoscopy a month, and family practice doctors doing so as well. I bet when you go get your first colonoscopy you go find a skilled high volume endoscopist to examine your colon.