I have had 5 colonoscopies. I am overdue for the next one because of Covid. Colon cancer is the second leading cause of death by cancer, about 860,000 deaths. If you get it and survive then you are in for a series of chemo and radiation treatments. Everybody's cancer affects patients differently. I have had treatments for another kind of cancer. Chemo causes weeks of nausea, headaches, fatigue and digestive problems. Radiation kills the cancer but it has serious side effects. It's hellish.
You may find this odd but I don't mind the colonoscopy. It's about takes about thirty minutes and you can sleep through it. I chose to not take anything. Next to your face is a TV screen that the doctor uses to follow the probe. They take pictures of possible cancers. If they find a polyp they have a wire lasso that clips off the polyp. You don't feel anything.
The colon flattens out after you purge your colon. They blow it up with air to make it look like the pictures you see of the colon. The colon does not look like the inside of a plastic hose. The colon is living tissue. There are complex details which fascinate me. The compressed air makes you feel like you need to go to the bathroom. The colon is of course empty so nothing is going to happen.
No doubt it's a yucky thing for most. The numbers are against if you choice to wait.