@Captain24 Thank you.
Well, I can affirm for you that I do not think any of my bipolar friends are: crazy, unsafe, or "too extreme".
I do see they have strong passions (😍), challenges when in a mania or depression (empathy for them), and are self-aware that if they don't seek support then it can put themselves (or others) at risk - but they are responsible and work with their doctors and friends/family/supports to help notice early warning signs. 🤗. In my eyes, they are in a really tough situation and they do their best, and that is enough.
I'm so sorry that someone at work did not feel you were "able to work" and questioned your ability. That would be so painful and hurtful. It sounds like they do not have a true understanding of you or your situation (except for it due to the fatigue you are feeling? as you mentioned that can be a real risk when driving).
I had a workmate with bipolar (he told me; his boss knew. most others didn't know what type of "sickness") - he was off work for 1 month at a time sometimes, without notice/predictability. It could make it hard for the rest of us but only because the workplace did not have a back-up plan for people being sick!! It's not his fault - our workplace failed us all in that. It happened for those with physical illness too.
It probably helped that his boss also had bipolar and understood from a lived experience too.
Coworkers were just told he was "on leave for the next month" 😊 and to plan accordingly.
I've been on leave for 3 months so far, and have another 3 months at least of leave. I was really concerned about this last year prior to going on leave (knowing it would be extended, and that my doctor would only initially write a 1-month certificate, and how that would affect business/staffing plans for my managers when I can't tell them it will be xx-months in total). HR assured me that it was their responsibility (HR & managers) to work this out, and not mine to worry about, and that things like this happen with other employees too and they manage it OK. Now, I did have an amazing HR person (and still do in my new ones), and I know not everyone has that experience 😓. But I hope this can be encouraging and validating that it is not you that is the problem. If my HR advise me that its HR's responsibility -- take trust that it should also apply to you too (even if HR fail you in it. It's a "them" issue).