This site does not offer medical advice.
People can ask, but it is not to be given to them. Just because you found requests for medical advice doesn't mean squat. It's the responses that are against the TOS. But the questions? Knock yourself out and ask (and you'll be told to go visit a doctor in person).
I imagine you've heard of physician-patient privilege, and patient privacy.
You may have also heard of medical malpractice and of people impersonating doctors for lulz.
If someone is offering medical advice (telling someone to get counseling or go to the ER, or put on a band aid is not medical advice), then feel free to report them by clicking the Report button.
BTW, my doctor does offer advice online. She does so in private communications with me, a patient she's seen for over a decade, where my privacy and the physician-patient privilege are both satisfied. She sure as hell doesn't go on a public message board and spitball remedies for people who need someone to actually examine them in person. She is a diligent professional, and spouting off-the-cuff stuff to people online, using unsecured methods, is neither diligent nor is it professional.