I am not going to comment on a personal case since this is between you and your doctor.
Plenty of people have high levels of LDL cholesterol and over time this puts them at risk for narrow arteries, stroke and heart problems.
Many people can improve their levels by eating healthier, but in some people the problem is with the liver and not their diet. These people would still have high levels of cholesterol regardless of how well they eat.
Your body needs some cholesterol to make cell membranes, steroids and hormones. It’s there for a reason.
There are many types of cholesterol. HDL levels are seen as good. No one talks about chylomicrons, various Apos or VLDL so the mass media discussion is a simplified version of reality. Triglyceride levels also likely contribute to risk, but exactly how much is not definitively understood.
Statins were originally tested for people up to age 75, and more recent studies have shown a benefit in veterans beyond this age.
I think they are clearly beneficial in people with elevated LDL cholesterol with other risk factors: diabetes, smokers, high blood pressure, family history, obesity, minimal exercisers. They are beneficial for many people approaching these categories too, like those with high-normal values. Exactly where the cutoff is between who benefits and who does not is not always clear to me despite guidelines. If you have had heart problems being on a statin makes good sense if it is tolerated.
They are good drugs. Niacin is too, in my mind, despite two big studies showing the sustained release version (which includes another medicine) are not helpful in terms of reducing mortality. The plain version of niacin is still helpful, and reduces arterial deposits, but is tough for many to take as it causes flushing and itching at therapeutic doses.
Statins reduce mortality. There are other drug classes that also work but seem to show less benefit for that. Still, it’s a gestalt, you could reduce mortality with more exercise and healthier lifestyle choices too.