Nobody here is allowed to act as professional or give advice contradicting that of the actual doctors/therapists. If someone tries, mod team makes sure they stop very quickly. Because either the poster is not a professional, and then their "advice" is useless, or they are, and then they should know what they are doing is unethical.
So basically we exchange our experiences.

What I found very useful after my diagnosis was that I had no clue what was going on – my psychiatrist was just like "you have bipolar, any questions, no, ok bye". Things were happening to me that I didn't understand. I found this forum extremely helpful, warm and caring. No professional would have been able to give me most of the advice I received here, if only because psychiatrists (with exceptions of course...) don't actually know what the patients are going through. They have their research, their books, practical knowledge but ultimately they have no clue what mania, hallucinations, addiction FEEL like. People here know how it feels.
The mod team, including myself, are here to make sure the discussions are civil and the rules are being observed. We don't have any medical qualifications we could use here. I am sure there are more beneficial ways for people to interact, but this forum is what it is.
I hope this answers your questions!
Currently working on my upcoming signature.