I've had 3 colonoscopies so far. I get them every 5 years because of polyps. My next one is the first quarter of 2022. Except for the first one, I have no problem with the prep. I don't recall the name but the taste isn't that bad.
I have a friend who swears off doctors. Well, as she told me, she was using the toilet one day and she saw blood which scared her. Got checked out and yes, she it was rectal cancer. She did chemo and it is in remission for the time being.
Some people just don't like doctors or they don't want to know. I recall my first boss who was a jolly Irish guy. He told me his wife would get on him to see a primary doctor for routine check ups. He ignored her. Well, at the age of 55, he got sick and finally gave in. Was diagnosed with prostate cancer. He was a goner in less than 6 months. Obstinate, yes! Preventable, yes!