I think you are over-reaction a tad, Teddio,
AB offers the following disclaimer "Disclaimer: The information provided here should not replace the advice of a medical professional or be used for "definitive" diagnosis. If you are in need of medical attention please contact your GP or out-of-hours doctor, if you need help finding this information,"
But people will often want some additional sources of information than via their own GP/MD/Medical Professional, who they may not be able to contact right at that moment.
It can be useful and interesting to read problems and the informed opinions from posters here. Whilst it is obviously difficult to verify the bona fides of individual posters in an anonymised forum, those who have been reading for some time will recognise the value and experience of at least some of the regular posters here.
And of course, everyone is fully entitled to disregard any or all advice posted...