If someone just has to make up his mind, then he needs to be neither intelligent nor reasonable. I suspect you mean that a person can come to some sort of opin

If someone just has to make up his mind, then he needs to be neither intelligent nor reasonable. I suspect you mean that a person can come to some sort of opinion that would be "good" in the sense that they have chosen the one that most likely prolongs their life, prevents illness, etc. Perhaps that is true, if "enough consideration" is equivalent something like 2 years of basic medical education and 2 years of clinical experience. Instead, most people have to make do with their own trusts, biases, limited information, etc. I think it's unreasonable to think that an untrained person is going to catch up enough after reading a few articles that they are going to make an informed decision. That's why we have doctors, to help us make informed decisions about our health. We can use their synthesis of education and experience to guide our values to make decisions that are not only self-satisfying but also reasonably accurate.