It pulls both ways. I have a friend who died quite recently of cancer of the liver. It took them 5 years to discover that the liver problems she had were caused by the statins she was taking. Was her primary liver cancer the result of the damage her liver had sustained from the statins? I do not know, but it is not unreasonable to link them. Statins may save some, they may equally probably contribute to other people's deaths.
Having said that I do think there is clear evidence for the efficacy of statins for those with pre-existing cardiac conditions. And it does strike me as reckless for someone with a severe heart problem not to take them. It is the lack of evidence of efficacy for those whose cholesterol may be raised but who have no signs of heart disease that is still unproven and many studies, have shown that women in particular gain no benefit from taking statins.
Search and read the evidence on the internet and you will find strong arguments for and against statins, by experts in the field, all with impeccable medical backgrounds. But that information has been available since before the internet. I first became wary about statins as the result of reading information about them in paper sources. The internet has enabled me to study a far wider range of literature and none of it has done anything to alleviate my initial concern.
We need to remember that medicine is an art not science, a drug that works for one person, doesn't for another, a drug that causes dangerous side effects for one person, cures another. I am allergic to penicillin. It could kill me. For the majority of people it is an effective antibiotic and has saved many lives