Nathan
Great work! 
I believe there is a need for health discourse in NZ as I see a gap for our issues to be discussed among professionals. Lived experience is important, the anecdote to illustrate a cause has great merit. We donāt need to have cancer to be an oncologist, to have a uterus to be an obstetrician, so surely our common interest in the health of NZ is commonality enough. Diversity brings great strength - and that encompasses our professional diversity also.
I agree there is a need for such a digital tool to solve this, or facilitate discussion just where the right place for this to sit - I am not sure.
There are many advantages to a forum that is moderated over facebook. The negativity of FB in my view, is counterproductive - but it seems it is where people hang out. I struggle to cut through the dross to the real discussions and interesting, informed or learned opinion. I have tried the FB covid doctors page, but find I donāt read much on it because of the noise.
Engagement remains the challenge. 
I donāt live my life in FB - and I do keep work and private/social life separate - so I donāt like the mix that others do. I keep my notifications to āpull modeā rather than āpushā so I can focus on one thing at a time - and get things done without interruption. I have allocated time for pulling my FB stream - and sometimes I just donāt. I know - how can I leave FB unchecked? 
I live in my emails - so I like the Health Forumās weekly updates - I can jump into the Forum if I would like (easy enough to delete the email if I donāt, or park in my to do later folder). This could work more seamlessly with some clever IT ninjas like you Nathan, on the case.
There will always be tension with small groups, professional groups or silos - and true multidisciplinary discourse.
The first is easiest and safest and where people gravitate to and hold dear - or defend the purpose (sometimes to the detriment of conversation). We were brought up in medical school to be like this, and it gets more definitive as we specialize, then amasses a steroid boost when we are working in the professional sub-type we have chosen (Public health, pathology, GP, surgeon etc). This is fueled by constant need to prove our choice is worthy, but also because we have to fight for funding - so we defend our patch vigorously.
The latter - multi-disciplinary discourse - is harder - but in my view where we have a gap, where the conversations can have some transformative change for health in NZ.
I would love to be able to bring up issues with Paediatricians - and all of the subgroups of paediatricians as there are now. I would also love to discuss issues of primary care with GPs. Recently I have been interested in our Public Health and Occupational Health issues as Covid-19 is here. There are other parts of health that I am also keenly interested in - maybe I have not heard of them, or have no time for them, or I donāt even know what I am missing.
I am interested in the Cannabis referendum, the end of life bill, and the recent decision to take womenās health and psychology out of the medical curriculum in 2023 (Otago University Chch campus). I would invite discussion from those not only in my small silo - but the broader range of medical professionals that brings a perspective I may not have considered - or perhaps have shelved in my busy paediatric space.
Instead I see interesting discussions around these issues that are going to shape the future of NZās health system with little input from the professions that understand them best. The NZMA were sidelined by the PM when they raised the issues relating to General Practice within the Covid-19 response - so where and how do we get our voice? A place for discourse would perhaps enable us to look at evidence, gather up opinion, fire up our interest, ask questions, think ā¦
I attended the RACP webinar yesterday from occupational health - the first speaker was eloquent as she went through the scientific evidence on PPE - and the mistakes being made as we are being fed political ideology not supported by science around the high rate of infection of healthcare workers that is attributed to community spread when they are working in a hospital with Covid-19. Another example of how we need to disseminate to ourselves good quality information from well trained and respected academics, and not fall victim to believing the rhetoric we are fed from the media. It is frightening as there is a lot of it!
Just imagine if we could solve issues by collaboration without re-inventing the wheel? What if a clinical conundrum could be posed to the forum to ask the collective wisdom for advice?
So - it would be good if Health forum could be a space to facilitate the three aspects you outline.
These are my thoughts. 
Pam.