I dont agree (as someone with bipolar). Although I sort of see where you're coming from!
Perhaps the phrasing could be tweaked in DSM so that BP is seen more as a 'condition' and less as an 'illness' - as per, say, autism or ADHD? That may well happen going forward, as attitudes towards mental health develop over time.
I have seen it with autism (DS is Aspie). Even 6 or 7 years ago 'autistic spectrum disorder' was commonly used by HPs and all the language around autism seemed to be quite bleak and focussed on the limitations and impairments. Fast forward a few years and attitudes are massively changing as society comes to understand and accept the breadth of the autism spectrum (not all rosy, but far better than it was).
It would be interesting to see what a wide range of people with BP think, though, wouldnt it? For me, it has been a curse to be honest and feels very much like an illness. I cant see any positives to it. All the 'highly creative' stuff when manic means jack shit when you sabotage your life in depressingly repetitive cycles and undo any good you have done in your life
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This is quite different to autism, where I can see the amazing way that Ds's brain works because of his autism, despite the many frustrations and limitations it also brings.
Struggling to see the connection with homosexuality, though, other than societal attitudes towards it have changed, whereas we still live in the dark ages re:mental health...is that what youre getting at?