I asked a doctor on the last occasion I had the argument to explain his reasoning. This took him aback, and he started mumbling about some old study that had been done on an obscure Chinese tribe that had significantly lower cholesterol and significantly lower levels of cardiovascular disease. I pointed out that I was not, and never had been, a member of an obscure Chinese tribe, and that therefore they no doubt has significantly different genetic and environmental reasons for the low CVD. I also pointed out that cholesterol is vital to life as it is used to form the protective myelin sheath of each and every cell in the body, and could he tell me the level at which the lack of available cholesterol would lead to nervous disorders. When I was on statins for 6 months after diagnosis my cholesterol level went down to 2.3 - the DSN said this was the lowest she had ever seen, and she couldn't answer the question about how low could it go either. My last reading was 4.6, which I am content with. I do accept that some people with particularly high chol levels benefit from statins, but if you're not in that category then the benefits are minimal (out of 100 people on statins, 3 will gain benefit) and the risks of taking such a powerful medication possibly higher.
Just my personal experience, I'm not a doctor but I do need convincing evidence before taking any medication. 🙂