You have infinitely more self-discipline than me. I’ve never been able to change one food item in one meal. Or exercise more than one day in a row. And no colonoscopies or other invasive procedures. Waist 33 or 34. But my mom lived until 102 without doing anything special and only expired then because of a fall so I hope to be around for a while longer than my current 66.
Get checked anyway. Lost a couple of friends to colon cancer. It’s a very hard way to go.