I agree with you to a point. However, you may like someone's advice but how do you know it is good advice. Example if I told you that eating 1 Kilo of chocolate will actually help you lose weight so you should do it, you may like that advice, but now ask me about my credentials in weight loss management. None...zip...nadda...zero. For all you know I may have gotten that advice from the Hershey website. So sometimes credentials are important in order to figure out once experience on the subject matter.
Would you really take an opinion about how to use a katana sword from someone who has only watched the Last Samurai movie and based his knowledge off of that? While there is some insight that does not need credentials established, I believe there is other insights that do require a bit of backing in order to have an opinion be taken seriously.
I wouldn't ask any of these questions on a public forum. As much as I love MT I wouldn't expect to have those answered here, if you read any medical thread here you will find posters telling the OP to go see a doctor. I wouldn't ask these questions on the internet either. Qualifications are important however these are found in real life not on forums.