I think it will change once high quality* research about LCHF is published, accepted and promoted. I think there is some promising research currently underway?
*Usually the writers of guidelines will only accept large scale randomised controlled trials, not small studies or case reports, and the studies should be published in "high impact" journals, rather than lesser-known, less reliable publications.
Normally I only accept this level of evidence too. But in this case I accept the anecdotal evidence of the hundreds of people I've seen post in this forum, plus my own anecdotal experience of what my BG meter and my body are telling me. In short, we know it works, but to get the approach into formal guidelines, it has to be proven in a certain way. This system prevents ineffective and potentially harmful treatments being approved. The downside is that when there is a potentially helpful treatment, it takes a long time to get it approved.
So I give it 5-10 years before we will be able to tell our GPs and nurses to check their guidelines. By then, hundreds of thousands of people will have suffered poorer health than necessary, and will have cost our countries millions.
It won't happen overnight, but it will happen.