Medicine and Wisdom

1. Fever are part of your body's immune system. In most case, taking something such as aspirin to lower it will make the actual sickness last longer.
2. Morning sickness largely prevents a pregnant woman from eating things that would be harmful to her child (which has lower tolerance for toxins).
3. Contraception and/or abortion has dropped the fertility rate well below replacement level across most of the west, with no foreseeable way of getting it back.
4. High blood pressure is usually the result of atherosclerosis (hardening of the arteries). There is ongoing debate over whether treating the high blood pressure itself actually increases your life expectancy at all.
5. Evolution requires that living individuals die off in order to free up resources for their offspring. Low-food-chain creatures such as mice and rabbits can be depended on to get themselves eaten sooner or later (usually sooner), but apex predators such as such as wolves and crocodiles need (and have) other mechanisms. This suggests that trying to increase human life expectancy indefinitely is a bad idea. (Logically, this would not apply to creationists, but I have found they generally already think that people should not live forever, at least in theory).

Response

I am not sure that morning sickness is just nature's way to prevent the mother from eating toxiins, but instead just the body's period of adjusting to a new hormonal balance. Later in the pregnancy, the morning sickness passes but still there remains the mother's sensitivity to toxins ingested throughout her pregnancy, no?