Cholesterol and Heart disease

Lately I've come across a few articles that question the relationship between Cholesterol and Heart disease. I've also read some articles which states that Statins (Cholesterol lower medication) are not necessary a good thing.

Below are some links to articles about these topics.

Cholesterol and Heart disease

Saurated fat not major issue

Sweden rejects low fat diet

Statin nation

Does Cholesterol cause heart disease

Do you take any of these 11 dangerous statins

The reason for my post is that before my heart attack I didn't have high Cholesterol and even now after the attack my cholesterol is low but I am on statins. The Doctor prescribed it as a precaution after attack and not because I have high cholesterol. 

My question is just why take medication if you’re not sick, only for precaution? Isn't a healthy diet and exercise the medicine you really need?

The other day I was at the doctor and suggested that I want to stop using the medication as what I've read and understood from the articles I am doing more damage than good and it is also now proven that if I should have had high Cholesterol it is not necessary a bad thing or the cause of heart attacks. Needless to say the Doc said no, I must still use them.

My question is who to believe? Do I stick with “old school” believes and studies or go with new studies and believes

Would welcome your comments and opinions