I've kind of been of the mind that the root of the stigma in this case is the inability of most normal people to acclimate well to unpredictability. And rightly so, I think, given how low is the average threshold for effective management of anxiety. It has to be recognized that people who do sudden, spontaneous things around others have a tendency to engender discomfort, at the very least.

What's more, everyone is conditioned by popular convention to accept being ok as the norm, or the common state to which everyone should aspire; hence someone who can never be completely ok falls outside the bounds of conventional expectation. And that, naturally, leads to a disproportionate level of othering where these mentally ill people are concerned.

If better understanding is be achieved, the average person has to come to terms with the fact that not everyone can live completely ok, and must accept a lifetime of being content in that state. I don't see it happening, though, given how most people can't even be bothered to read properly between the lines when it comes to absorbing their local news. Our collective cognitive depth perception isn't that robust.