Senseless treatments in modern medicine

When we are afflicted with illnesses, it make sense to visit a doctor and get pills to cure the illness. Often the pills are designed to combat the causes of the illnesses. If we are infected with bacteria, doctors give anti-bacteria.
If we are infected with virus, doctors give anti-virus. Unfortunately, not all illnesses are as straight forward as this.
If we have high cholesterol due to our appetite for crabs, prawns, burgers, fried chicken, beef and bacon, the sensible thing to do is to reduce or avoid all those cholesterol rich foods.
What does not make sense is to take pills to lower the cholesterol so that we can continue stuffing our body with cholesterol rich foods. However, that exactly what our doctors are going to do and what we probably expect them to do.
If we have high blood pressure due to a stressful life, toxic foods, being too fat or leading a sedentary life, the sensible thing to do is to avoid toxic foods, lead an active but relaxing life and reduce weight.
What does not make sense is when we take pills to reduce the high blood pressure so that we can continue taking toxic foods, leading a stressful and sedentary lifestyle and being fat. However, that exactly what we would expect from our doctors and they will happily oblige.